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Guidance

Materials for Organic Crop Production

The tables included in the guidance, Materials for Organic Crop Production, NOP 5034-1, guide the 

organic industry regarding materials for use in organic production. The tables include materials which 

are considered nonsynthetic (natural), and are not required to be included on the National List. 

The table of materials is consistent with the National List, and does not include materials which are 

prohibited under the USDA organic regulations.

This table of materials is not part of the National List, although it also includes materials on the National 

List. This table is not exhaustive. There may be nonsynthetic (natural) materials which are not included 

in the guidance, but which meet the requirements for use in organic production and handling. Producers 

should always check with their certifying agent regarding the use of any materials prior to their usage.

For additional information on this document, please refer to NOP 5034.

Acetic Acid Nonsynthetic

Made by oxidative or anaerobic fermentation. 

Solutions that contain less than 8% acetic acid 

are vinegar. See also, Vinegar.

Reference: 7 CFR 205.105

Agar Nonsynthetic

Also called “agar-agar.” See also, Aquatic Plant 

Products.

Reference: 7 CFR 205.105

Agricultural Substances Nonsynthetic

Agricultural substances are permitted unless 

specifically prohibited at § 205.602.

This includes, but is not limited to, agricultural 

products listed at § 205.606 of the National List.

Agricultural substances used in organic crop 

production are not required to be certified 

organic. 

Reference: 7 CFR 205.105

Alcohol Nonsynthetic

Ethanol made by fermentation is permitted 

without restriction. For synthetic alcohol, see 

Ethanol or Isopropanol.

Reference: 7 CFR 205.105

Alfalfa Meal or Pellets Nonsynthetic

Pelletization process must not involve prohibited 

materials.

Reference: 7 CFR 205.203(c)(3)

Algae Nonsynthetic

See Aquatic Plant Products.

Almond Hull Trash Nonsynthetic

See Plants.

Aloe Extract Nonsynthetic

See Plant Extracts.
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Amino Acids Nonsynthetic

Natural amino acids derived from plants, 

animals, and microorganisms that have not been 

genetically modified are permitted. Amino acids 

that have been chemically modified from their 

source are prohibited.

Reference: 7 CFR 205.105

Ammonium Carbonate Synthetic

Permitted only for use as bait in insect traps. No 

direct contact with crop or soil.

Reference: 7 CFR 205.601(e)

Animal By-Products and 

Materials

Nonsynthetic

Includes parts of animals and animal byproducts. May not be used in a manner that 

contaminates crop, water or soil with pesticide 

residues, heavy metals or pathogens.

Reference: 7 CFR 205.105 & 205.203(b)

Aquatic Plant Products Nonsynthetic or 

Synthetic

Nonsynthetic

Natural aquatic plants and plant products, 

including plant products extracted with 

nonsynthetic materials, are allowed.

Synthetic

Synthetically extracted aquatic plant products 

are permitted as plant or soil amendments.

Extraction process is limited to the use of 

potassium hydroxide or sodium hydroxide; 

solvent amount used is limited to that amount 

necessary for extraction. May not contain 

synthetic preservatives or other substances not 

provided for at § 205.601(j).

Reference: 7 CFR 205.105, 205.203(c)(3), and 

205.601(j)(1); NOP Policy Memo 14-1

Arthropods Nonsynthetic

See Biological Controls and Predators and 

Parasites.

Reference: 7 CFR 205.206(b)(1) & 

205.206(d)(2)

Ash Nonsynthetic

Ash from plant and animal sources is permitted 

if it has not been treated or combined with 

prohibited substances. Ash from burning manure 

is prohibited.

Reference: 7 CFR 205.203(d)(4) & 205.602(a)

Attapulgite Clay Nonsynthetic

See Clay.

Azadirachta Indica Nonsynthetic

See Neem and Neem Derivatives.

Bacillus Species Nonsynthetic

Includes B. amyloliquefaciens, B. cereus, B. 

polymyza, B. lichenformis, B. sphaericus, B. 

subtilis, and B. thuringiensis.

Reference: 7 CFR 205.105

Bagasse Nonsynthetic

Leftover plant stalks and fibers from sugar 

processing. See Food Processing By-Products.

Reference: 7 CFR 205.203(c) & 205.203(d)(5)

Bark Nonsynthetic

Reference: 7 CFR 205.203(c)(3)

Basalt Nonsynthetic

See Mined Minerals.

Beauveria bassiana Nonsynthetic

Reference: 7 CFR 205.105
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Beeswax Nonsynthetic

Reference: 7 CFR 205.105

Bentonite Nonsynthetic

See Clay.

Biochar Nonsynthetic

Biochar is biomass that has been carbonized or 

charred. Sources must be untreated plant or 

animal material. Pyrolysis process must not use 

prohibited additives.

Reference: 7 CFR 205.203(d)(4)

Biodegradable 

Biobased Mulch Film

Synthetic

See Mulch.

Biodynamic 

Preparations

Nonsynthetic

Includes horn manure spray, horn silica, yarrow 

flowers, chamomile, stinging nettle, oak bark, 

dandelion, valerian, and horsetail (equisetum) 

spray. Preparations containing animal manure,

including horn manure spray, must comply with

manure restrictions at § 205.203(c)(1).

Reference: 7 CFR 205.105 & 205.203(c)(1)

Biological Controls Nonsynthetic

Includes living organisms and viruses that are 

not regulated as biopesticides. Genetically 

modified organisms are prohibited. See also, 

Predators and Parasites.

Reference: 7 CFR 205.206(b)(1) & 

205.602(d)(2)

Biotite Nonsynthetic

See Mined Minerals.

Blood Meal Nonsynthetic

Reference: 7 CFR 205.203(c)

Bone Char Nonsynthetic

Reference: 7 CFR 205.203(d)(4)

Bone Meal Nonsynthetic

Reference: 7 CFR 205.203(c)

Borates and Borax Nonsynthetic

Natural mined sources are permitted. For 

synthetic boron, see Boron Products.

Reference: 7 CFR 205.105, 205.206(b)(3), &

205.206(d)(2)

Boric Acid Synthetic

Permitted as an insecticide for structural pest 

control, no direct contact with organic food or 

crops.

For micronutrient use, see Boron Products.

Reference: 7 CFR 205.601(e)(3)

Boron Synthetic

Soluble boron products are permitted as a plant 

or soil amendment. Soil deficiency must be 

document by testing. Allowed soluble boron 

products include boric acid, hydrated forms of 

sodium tetraborate, sodium borate derivatives, 

disodium octaborate, and its hydrated forms, and 

hyrdrated forms of colemanite. Boron products 

made from nitrates or chlorides are not allowed.

Not to be used as a defoliant, herbicide, or 

dessicant. 

Reference: 7 CFR 205.601(j)(6)

Brewer’s Waste Nonsynthetic

Reference: 7 CFR 205.203(c)

Calcium Nonsynthetic

See Calcium Carbonate, Gypsum, or Calcium 

Chloride
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Calcium Carbonate Nonsynthetic

Also called “limestone.” Naturally mined forms 

are allowed. May not be sourced from byproduct of food or paper processing.

Reference: 7 CFR 205.203(d)(2)

Calcium Chloride Nonsynthetic

Nonsynthetic sources only (from brine process).

Permitted only as a foliar spray to treat a 

physiological disorder associated with calcium 

uptake. Synthetic sources of calcium chloride 

are prohibited.

Reference: 7 CFR 205.602(c)

Calcium Hydroxide Synthetic

See Hydrated Lime.

Calcium Hypochlorite Synthetic

See Chlorine Materials.

Calcium Lignosulfonate Synthetic

See Lignin Sulfonate.

Calcium Polysulfide Synthetic

See Lime Sulfur.

Calcium Sulfate Nonsynthetic

See Gypsum.

Cannery Wastes and 

Cannery Waste Water

Nonsynthetic

Includes peels, stems, and cores, vegetable and 

fruit waste processed by physical or mechanical 

means. Plant and animal materials may not be 

chemically altered by a manufacturing process 

unless: the resulting material is provided for 

under § 205.601; the chemical change is created 

by a naturally occurring biological process; or 

the chemical change is created by heating or 

burning biological matter.

Reference: 7 CFR 205.203(d)(5)

Capsaicin Nonsynthetic

See Plant Extracts.

Cardboard Synthetic

See Newspapers or Other Recycled Papers.

Carnauba Wax Nonsynthetic

See Plants.

Castor Oil Nonsynthetic

See Oils, Plant and Animal

Chalk Nonsynthetic

See Mined Minerals.

Chelating Agents Nonsynthetic or 

Synthetic

Natural chelating agents are allowed. Allowed 

sources of chelating agents include, but are not 

limited to, nonsynthetic amino acids, citric acid

(to form citrate in solution), tartaric acid made 

from grape wine, and gluconic acid.

Synthetic chelating agents are only permitted if 

included on the National List for that purpose.

Reference: 7 CFR 205.105 & 205.601(j)(4)

Chitin Nonsynthetic

Must be from a natural source, such as sea 

animals or fungi.

Reference: 7 CFR 205.105

Chlorine Dioxide Synthetic

See Chlorine Materials.
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Chlorine Materials Synthetic

Permitted as an algicide, disinfectant, and 

sanitizer, including irrigation system cleaning 

systems.

Allowed chlorine materials include calcium 

hypochlorite, chlorine dioxide, and sodium 

hypochlorite. Allowance also includes 

electrolyzed water (hypochlorous acid). Use 

must comply with Safe Drinking Water Act 

levels of 4 mg/L (4ppm) expressed as chlorine, 

or 0.8 mg/L (0.8 ppm) expressed as chlorine 

dioxide.

Residual chlorine levels in the water shall not 

exceed the maximum residual disinfectant limit 

under the Safe Drinking Water Act (SDWA). 

Residual Chlorine levels in the water in direct 

crop contact (when used pre-harvest) or as water 

from clearing irrigation systems applied to soil 

should not exceed the maximum residual 

disinfectant limit under the SDWA. Chlorine 

products may be used up to maximum labeled 

rates for disinfecting and sanitizing equipment 

or tools.

Reference: 7 CFR 205.601(a)(2) & NOP 5026;

NOP Policy Memo 15-4.

Citric Acid Nonsynthetic or 

Synthetic

Natural citric acid produced from microbial 

fermentation of carbohydrate substances (e.g., 

sugar) is permitted. Production process may not 

use genetically modified microorganisms.

Synthetic forms of citric acid are prohibited 

except as specified at § 205.601.

Reference: 7 CFR 205.105 & 205.601(j)(7)

Clay Nonsynthetic

Includes, but is not limited to, attapulgite, 

bentonite, montmorillonite, kaolin, and fuller’s 

earth. See also, Mined Minerals.

Reference: 7 CFR 205.203(d)(2)

Cobalt Synthetic

Permitted as a plant or soil amendment. Soil 

deficiency must be documented by testing. Not 

to be used as a defoliant, herbicide, or dessicant. 

Allowed forms include cobalt oxide (CoO), 

cobalt sulfate (CoSO4), cobalt carbonate 

(CoCO3), and cobalt silicates. Cobalt materials 

made from nitrates or chlorides are not allowed.

Reference: 7 CFR 205.203(d)(2)

Cocoa Bean Hulls Nonsynthetic

Reference: 7 CFR 205.203(c)(3)

Coconut Fiber Nonsynthetic

Reference: 7 CFR 205.203(c)(3)

Coffee Grounds Nonsynthetic

Reference: 7 CFR 205.105 & 205.203(c)(3)

Compost Nonsynthetic

Composted plant materials:

Compost that contains no animal materials as 

feedstock may be used without restriction 

provided that it contains no prohibited or 

restricted-use plant materials. Must be made 

from allowed compost feedstocks.

In-vessel or static aerated pile:

Includes plant and animal materials composted 

through a process that establishes an initial C:N 

ratio of between 25:1 and 40:1 and maintains a 

temperature of between 131°F and 170°F for 3 

days using an in-vessel or static aerated pile 

system. Must be made from allowed compost 

feedstocks.

Windrows:

Includes plant and animal materials composted 

through a process that establishes an initial C:N 

ratio of between 25:1 and 40:1 and maintains a 

temperature of between 131°F and 170°F for 15 
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days, during which period the composting 

materials must be turned a minimum of five 

times. Must be made from allowed compost 

feedstocks.

Alternative Composting Methods:

Compost is acceptable if (i) made from only 

allowed feedstock materials; (ii) the compost 

undergoes an increase in temperature to at least 

131oF (55oC) and remains there for a minimum 

of 3 days; and (iii) the compost pile is mixed or 

managed to ensure that all of the feedstock heats 

to the minimum temperature for the minimum 

time.

Animal Materials

Animal materials include, but are not limited to, 

manure, slaughter renderings, tankage, blood 

meal, etc.

Reference: 7 CFR 205.203(c)(2) & NOP 5021

Compost Inoculants Nonsynthetic

May not be cultured on sewage sludge. 

Synthetic growth media not approved for use as 

plant or soil amendments at § 205.601 must not 

be present in the formulated product.

Reference: 7 CFR 205.105

Compost Tea Nonsynthetic

Compost tea made from compost not meeting 

the requirements of § 205.203(c) or NOP 5021 

is subject to restrictions of § 205.203(c)(1) for

raw animal manure.

Reference: 7 CFR 205.203(c) & NOP 5021

Copper, Fixed Synthetic

For plant disease control, copper-based material 

must be used in a manner that minimizes 

accumulation in the soil and shall not be used as 

herbicides.

Copper products that are exempt from tolerance 

by the EPA [40 CFR 180.1021(b)(1)] are 

permitted. Allowed copper substances include

Bordeaux mixture, basic copper carbonate 

(malachite), copper-ethylenediamine complex, 

copper hydroxide, copper-lime mixtures, copper 

linoleate, copper oleate, copper oxychloride, 

copper octanoate, copper sulfate basic, copper 

sulfate pentahydrate, cupric oxide, and cuprous 

oxide. 

For other uses, see Copper Products and Copper 

Sulfate.

Reference: 7 CFR 205.601(i)

Copper Products Synthetic

Permitted as a plant or soil amendment. Soil 

deficiency must be documented by testing. Not 

to be used as a defoliant, herbicide, or dessicant. 

Allowed forms include copper oxide (CuO), 

copper sulfate (CuSO4), copper carbonates and 

copper silicates. Those made from nitrates or 

chlorides are not allowed.

For other uses, see Copper, Fixed or Copper 

Sulfate.

Reference: 7 CFR 205.601(j)

Copper Sulfate Synthetic

For micronutrient use, see Copper Products.

For plant disease control, substance must be 

used in a manner that minimizes accumulation 

of copper in the soil.

Use in Aquatic Rice Systems:

For use as tadpole shrimp control in aquatic rice 

production, use is limited to one application per 

field during any 24-month period. Application 

rates are limited to levels which do not increase 

baseline soil test values for copper over a 
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timeframe agreed upon by the producer and 

accredited certifying agent.

For use as an algicide in aquatic rice systems 

and for tadpole shrimp control in aquatic rice 

systems; use is not to exceed one application per 

field during any 24-month period. Application 

rates are limited to those which do not increase 

baseline soil test values for copper over a time 

frame agreed upon by the producer and 

accredited certifying agent.

Reference: 7 CFR 205.601(a)(3), 205.601(e)(4), 

& 205.601(i)

Corn Gluten Nonsynthetic

Reference: 7 CFR 205.203(c)(3)

Corn Steep Liquor and 

Solids

Nonsynthetic

Also called “condensed fermented corn 

solubles.”

See also, Food Processing By-Products.

Reference: 7 CFR 205.203(c)(3); NOP Notice 

11-3

Cotton Gin Trash Nonsynthetic

May not be used in a manner that contaminates 

crop, water, or soil with pesticide residues.

Reference: 7 CFR 205.203(c)(3)

Cottonseed Meal Nonsynthetic

May not be used in a manner that contaminates 

crop, water, or soil with pesticide residues.

Reference: 7 CFR 205.203(c)(3)

Crab Meal Nonsynthetic

See Shellfish Meal.

Crop Residues Nonsynthetic

May not be used in a manner that contaminates 

crop, water or soil with pesticide residues, heavy 

metals or pathogens.

Reference: 7 CFR 205.203(c)(3)

Cytokinins Nonsynthetic

See Growth Regulators.

Dairy Products Nonsynthetic

Includes, but is not limited to, dairy cultures, 

milk, cheese, cream, yogurt, casein, and whey.

Reference: 7 CFR 205.105

Diatomaceous Earth Nonsynthetic

Mined sources, including calcined forms.

Reference: 7 CFR 205.203(d)(2)

Dolomite Nonsynthetic

See Mined Minerals.

Dormant Oils Synthetic

See Oils, Horticultural.

Eggshell Meal Nonsynthetic

Reference: 7 CFR 205.105

Elemental Sulfur Synthetic or 

Nonsynthetic

See Sulfur.

Enzymes Nonsynthetic

May be produced by microbial processes or by 

extraction from plants or other organisms. Must 

not be from genetically modified organisms.

Reference: 7 CFR 205.105
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Epsom Salts Nonsynthetic or 

Synthetic

See Magnesium Sulfate.

Ethanol Synthetic

Also called “ethyl alcohol.” Permitted as 

algicide, disinfectants, and sanitizer, including 

irrigation system cleaning systems.

For nonsynthetic ethanol, see Alcohol.

Reference: 7 CFR 205.601(a)(1)

Ethylene Gas Synthetic

Permitted only for regulation of pineapple 

flowering. See 7 CFR 205.605(b) for allowed 

postharvest uses.

Reference: 7 CFR 205.601(k)

Fatty Acids Nonsynthetic

Fatty acids produced from plant or animal oils 

that have been hydrolyzed through heat, 

pressure, steam, or enzymes only.

Reference: 7 CFR 205.105

Feather Meal Nonsynthetic

Reference: 7 CFR 205.105 & 205.203(c)

Feldspar Nonsynthetic

See Mined Minerals.

Fermentation Products Nonsynthetic

Products made by the biological activity of 

bacteria, fungi, or other microorganisms.

Reference: 7 CFR 205.105

Ferric and Ferrous 

Compounds

Synthetic

For micronutrient use, see Iron.

Ferric Phosphate Synthetic

Permitted only as slug or snail bait. Also called 

“Iron Phosphate” or “Iron (III) Phosphate.”

Reference: 7 CFR 205.601(h)

Fish Meal and Powder Nonsynthetic

May not contain synthetic stabilizers or 

preservatives unless provided for at

§ 205.601(j).

Reference: 7 CFR 205.105 & 205.203(c)

Fish Products, Liquid Synthetic

Permitted as plant or soil amendments. May be 

pH adjusted with sulfuric, citric, or phosphoric 

acid. The amount of acid used shall not exceed 

the minimum needed to lower the pH to 3.5.

Reference: 7 CFR 205.601(j)(7)

Food Processing ByProducts

Nonsynthetic

Includes food waste, cannery waste, and 

pomaces. Plant and animal materials chemically 

altered by a manufacturing process are not 

permitted unless resulting material is provided 

for under § 205.601.

Reference: 7 CFR 205.203(c)(3) & 

205.203(d)(5)

Fuller’s Earth Nonsynthetic

See Clay.

Fulvic Acids Nonsynthetic

Fulvic acids are the fractions of humates soluble 

at neutral to acid pH. May be extracted from 

allowed humates with water or nonsynthetic 

acids. See also Humates.

Reference: 7 CFR 205.203(d)(2)
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Fungal Preparations Nonsynthetic

See Microbial Products.

Garlic and Garlic Oil Nonsynthetic

Reference: 7 CFR 205.105

Gibberellic Acid Nonsynthetic

Also called “Gibberellin A3.” Acceptable if 

made from a fermentation process. See also,

Growth Regulators.

Reference: 7 CFR 205.105

Gluconic Acid Nonsynthetic

Produced by fermentation by Aspergillus niger. 

See also, Chelating Agents.

Reference: 7 CFR 205.105

Granite Dust Nonsynthetic

May not be mixed with petroleum products.

Reference: 7 CFR 205.203(d)(2)

Green Manure Nonsynthetic

See Plants.

Greensand Nonsynthetic

See Mined Minerals.

Growth Regulators Nonsynthetic

Natural growth regulators include, but are not 

limited to, gibberellic acid, indole acetic acid 

(IAA) and cytokinins. Synthetic growth 

regulators are prohibited unless specifically 

included on the National List for this purpose.

Reference: 7 CFR 205.105 & 205.601(k)

Guano Nonsynthetic

Includes bat guano and seabird guano.

Domesticated fowl excrement is considered 

manure, not guano. Includes decomposed and 

dried deposits from wild bats or wild birds. 

Subject to raw manure restrictions at § 205.203 

unless composted or heat processed. Guano 

must not be directly treated with pesticides. 

Reference: 7 CFR 205.203(c)(1) & NOP 5006

Gums Nonsynthetic

Natural gums are allowed. Includes, but is not 

limited to, arabic gum; carob bean gum; guar 

gum; and locust bean gum.

Reference: 7 CFR 205.105

Gypsum Nonsynthetic

Only mined forms are acceptable. May not be 

sourced from recycled drywall. Also called 

“Calcium Sulfate.”

Reference: 7 CFR 205.203(d)

Homeopathic Preparations Nonsynthetic

Natural materials are allowed, unless included at 

§ 205.602. Any synthetic materials used must be 

included at section 205.601 of the National List

and used in compliance with any annotations 

provided. 

Reference: 7 CFR 205.105

Hoof and Horn Meal Nonsynthetic

Reference: 7 CFR 205.105

Horticultural Oils Synthetic

See Oils, Horticultural.

Humates Nonsynthetic

Acceptable if derived from leonardite, lignite, or 

coal. See also, Mined Minerals.

Reference: 7 CFR 205.203(d)(2)
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Humic Acids Synthetic or 

Nonsynthetic

May be derived from leonardite, lignite, coal. 

Naturally occurring deposits, water and alkali 

extracts only.

Reference: 7 CFR 205.203(d)(2) & 

205.601(j)(3); NOP Policy Memo 13-2

Hydrated Lime Synthetic

Permitted for plant disease control only. Not 

permitted as a fertilizer or soil amendment.

Reference: 7 CFR 205.601(i)

Hydrogen Chloride Synthetic

Gaseous form of hydrochloric acid. Permitted 

for delinting cotton seed for planting only.

Reference: 7 CFR 205.601(n)

Hydrogen Peroxide Synthetic

Also called “hydrogen dioxide.” Permitted as an

algicide, disinfectants, and sanitizer, including 

irrigation system cleaning systems. Also 

permitted for plant disease control.

Reference: 7 CFR 205.601(a)(4) & 205.601(e)

Inert Ingredients Synthetic

Includes substances categorized as EPA List 4—

Inerts of Minimal Concern on EPA list dated 

August 2004. For passive pheromone 

dispensers, substances classified as List 3 –

Inerts of Unknown Toxicity on EPA list dated 

August 2004 are also permitted.

Allowed inert ingredients are only permitted in 

pesticide formulations and may not be used in 

other types of products.

Reference: 7 CFR 205.601(m) and NOP 5008

Inoculants Nonsynthetic

Synthetic growth media not provided for on the 

National List at § 205.601 must not be present in 

the final product. See Microbial Products.

Reference: 7 CFR 205.105

Insect Extracts Nonsynthetic

Ground insects diluted with water (e.g., bug 

juice). 

Reference: 7 CFR 205.206(b)(3)

Iron Synthetic

Permitted as a plant or soil amendment. Not to 

be used as a defoliant, herbicide, or dessicant. 

Soil deficiency must be documented by testing.

Allowed forms include iron sulfates (FeSO4 or 

Fe2(SO4)3), iron oxides (FeO, Fe2O3, or Fe2O3), 

iron carbonate (FeCO3), and iron silicate. Those 

made from nitrates or chlorides are not allowed.

Reference: 7 CFR 205.601(j)(6)

Iron Phosphate Synthetic

See Ferric Phosphate.

Isopropanol Synthetic

Also called “rubbing alcohol” or “isopropyl 

alcohol.” Permitted as an algicide, disinfectant, 

and sanitizer, including irrigation system 

cleaning systems.

Reference: 7 CFR 205.601(a)(1)

Kainit

See Mined Minerals.

Kaolin Clay

See Clay.
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Kelp and Kelp Meal Nonsynthetic

See also, Aquatic Plant Products.

Reference: 7 CFR 205.203(c)(3)

Kieserite Nonsynthetic

A mineral found in marine evaporites, MgSO4·

H2O. See also Magnesium Sulfate and Mined 

Minerals.

Reference: 7 CFR 205.203(d)(2)

Lactic Acid Nonsynthetic

Produced through fermentation by Lactobacillus 

spp.

Reference: 7 CFR 205.105

Lactose Nonsynthetic

Precipitated from whey protein using ethanol. If 

synthetic ethanol is used, it must be removed 

from the final product. 

Reference: 7 CFR 205.105

Langbeinite

See Mined Minerals.

Leaf Mold Nonsynthetic

Reference: 7 CFR 205.105

Lecithin Nonsynthetic

See also, Agricultural Substances.

Reference: 7 CFR 205.105

Leonardite

See Humates.

Lignin Sulfonate Synthetic

Also called “lignosulfonate.” Includes 

ammonium lignosulfonate, calcium 

lignosulfonate, magnesium lignosulfonate, and 

sodium lignosulfonate.

Permitted as a chelating agent, dust suppressant, 

and as a floating agent in postharvest handling.

Reference: 7 CFR 205.601(j) & 205.601(l)

Lignite

See Humates.

Lime Sulfur Synthetic

Allowed as an insecticide (including acaricide or 

mite control) and for plant disease control. 

Includes calcium polysulfide.

Reference: 7 CFR 205.601(e) & 205.601(i)

Limestone

See Calcium Carbonate.

Limonene Nonsynthetic

Also called “D-limonene.”

Reference: 7 CFR 205.105

Magnesium Carbonate

See Mined Minerals.

Magnesium Chloride

See Mined Minerals.

Magnesium Rock Nonsynthetic

Reference: 7 CFR 205.203(d)(2)

Magnesium Sulfate Synthetic

Includes hydrated forms. Allowed with a 

documented soil deficiency.

See also, Kieserite.

Reference: 7 CFR 205.601(j)
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Magnetite

See Mined Minerals.

Maltodextrin

See Dextrose.

Manganese Synthetic

Permitted as a plant or soil amendment. Soil 

deficiency must be documented by testing. Not 

to be used as a defoliant, herbicide, or dessicant. 

Allowed forms include manganese sulfate 

(MnSO4), manganese oxide (MnO), manganese 

carbonate (MnCO3), and manganese silicate. 

Those made from nitrates or chlorides are not 

allowed.

Reference: 7 CFR 205.601(j)

Manure Nonsynthetic

Manure includes feces, urine, other excrement, 

and bedding produced by livestock that has not 

been composted (§ 205.2). Manure does not

include fish feces or insect frass.

Manure from organic or conventional livestock

is allowed for organic crop production under the 

conditions described below.

Raw Manure

Raw animal manure must be composted unless 

it is: (i) applied to land used for a crop not 

intended for human consumption; (ii) 

incorporated into the soil not less than 120 days 

prior to the harvest of a product whose edible 

portion has direct contact with the soil surface or 

soil particles; or (iii) incorporated into the soil 

not less than 90 days prior to the harvest of a 

product whose edible portion does not have 

direct contact with the soil surface or soil 

particles.

Composted Manure

Composted manure may be used as a 

supplement to a soil building program without a 

specific interval between application and 

harvest. See Compost.

Processed Manure / Heat Processed Manure

Processed manure may be used as a supplement 

to a soil building program without a specific 

interval between application and harvest. 

Processed manure must be treated so that all 

portions of the product, without causing 

combustion, reach a minimum temperature of 

either 150° F (66° C) for at least one hour or 

165° F (74° C), and are dried to a maximum 

moisture level of 12%; or an equivalent heating 

and drying process could be used.

Processed manure products must not contain 

more than 1x103 (1,000) MPN fecal coliform 

per gram of processed manure sampled and 

must not contain more than 3 MPN Salmonella 

per 4 grams of processed manure sampled.

Reference: 7 CFR 205.2, 205.203(c) & NOP 

5006

Manure Tea Nonsynthetic

Animal manure tea may only be (i) applied to 

land used for a crop not intended for human 

consumption; (ii) incorporated into the soil not 

less than 120 days prior to the harvest of a 

product whose edible portion has direct contact 

with the soil surface or soil particles; or (iii) 

incorporated into the soil not less than 90 days 

prior to the harvest of a product whose edible 

portion does not have direct contact with the soil 

surface or soil particles.

See also, Manure.

Reference: 7 CFR 205.203(c) & NOP 5006
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Marl

See Mined Minerals.

Meat By-Products and 

Waste

Nonsynthetic

Must not be treated with prohibited materials 

such as synthetic colorings or solvents. See also, 

Tankage.

Reference: 7 CFR 205.105

Mica

See Mined Minerals.

Microbial Biopesticides Nonsynthetic

Must not contain synthetic growth media unless 

provided for on the National List at § 205.601.

Reference: 7 CFR 205.206(d)(2)

Microbial Products Nonsynthetic

Microorganisms produced using genetic 

engineering are prohibited.

Reference: 7 CFR 205.105

Micronutrients Synthetic

See Boron, Cobalt, Copper Products, Iron, 

Manganese, Molybdenum, Selenium, or Zinc.

Milk Nonsynthetic

Reference: 7 CFR 205.105

Mined Minerals Nonsynthetic

Mined minerals are permitted if not processed or 

formulated with prohibited materials, such as 

synthetic dust suppressants, anti-caking agents, 

or pelleting agents. 

Manufacturing process should be reviewed since 

some substances can be produced using 

chemical synthesis or are industry by-products.

To be considered nonsynthetic, minerals must 

not have been heated (calcined) in a way that 

produces a chemical change in the material. 

Mined Minerals of Low Solubility

Includes, but is not limited to, basalt, chalk, 

clays, gypsum, langbeneite, leonardite, 

limestone, marl, mica, perlite, sand, stone meal, 

sulfate of potash, vermiculite, and zeolite. 

Mined Minerals of High Solubility

Includes calcium chloride and potassium 

chloride. Mined minerals of high solubility must 

be used in compliance with the conditions 

established at § 205.602.

Reference: 7 CFR 205.203(d)(2) & 

205.203(d)(3)

Molasses Nonsynthetic

Both organic and nonorganic molasses are 

permitted. Nonorganic molasses may not 

contain synthetic scale inhibitors, aggregation 

and precipitation agents, or additives to control 

fluidity that are not provided for at § 205.601.

Reference: 7 CFR 205.105

Molybdenum Synthetic

Permitted as a plant or soil amendment. Soil 

deficiency must be documented by testing. Not 

to be used as a defoliant, herbicide, or dessicant. 

Allowed forms include molybdic oxide (MoO3) 

and sodium molybdate (Na2MoO4). Those made 

from nitrates or chlorides are not allowed.

Reference: 7 CFR 205.601(j)

Montmorillonite Clay

See Clay.
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Mulch Nonsynthetic or 

Synthetic

Mulch includes any nonsynthetic material, such 

as wood chips, leaves, or straw, or any synthetic 

material included on the National List for such 

use, such as newspaper or plastic that serves to 

suppress weed growth, moderate soil 

temperature, or conserve soil moisture.

Natural Mulch

Includes leaves, straw, crop residues, and other 

fully biodegradeable materials. 

Newspaper and Recycled Paper

Newspaper or other recycled paper, without 

glossy or colored inks, is permitted as mulch.

Plastic Mulch

Petroleum-based plastic mulch, other than 

polyvinyl chloride (PVC), is permitted. The 

allowance does not include biodegradable

plastic. Plastic mulch must be removed from the 

field at the end of the growing or harvest season. 

For crops grown as annuals, removal must occur 

annually. For perennial crops, plastic mulch 

must be removed before the plastic decomposes 

or breaks down to prevent removal.

Biodegradable Biobased Mulch Film

Biodegradable biobased mulch film is defined as 

a synthetic mulch film that meets the following 

criteria:

(1) Meets the compostability standards of 

ASTM D6400 or D6868, or of other equivalent 

international standards, i.e., EN 13432, EN 

14995, or ISO 17088;

(2) Demonstrates at least 90% biodegradation 

absolute or relative to microcrystalline cellulose 

in less than two years, in soil, according to ISO 

17556 or ASTM D5988 testing methods, or 

meets other applicable ASTM specification for 

aerobically biodegradable plastics in soil 

environment; and

(3) Must be biobased with content determined 

using ASTM D6866 testing method.

Biodegradable biobased mulch film must be 

produced without organisms or feedstock 

derived from excluded methods.

7 CFR 205.2, 205.203(c), 205.206(c), & 

205.601(b); NOP Policy Memo 15-1

Muriate of Potash

See Potassium Chloride.

Mushroom Compost and 

Spent Mushroom Substrate

Nonsynthetic

Must be derived from allowed materials. 

Materials that contain manure are subject to 

restrictions at § 205.203(c)(1) for raw animal 

manure unless they are composted before or 

after mushroom production according to 

§ 205.203(c)(2) or NOP 5021. See also, 

Compost.

Reference: 7 CFR 205.105, 205.203(c), and 

NOP 5021

Mycchorhizae Nonsynthetic

Reference: 7 CFR 205.105

Neem and Neem Derivatives Nonsynthetic

Includes neem cake and neem oil. Azadirachtin, 

an extract of neem, is also permitted.

Reference: 7 CFR 205.105

Nematodes Nonsynthetic

See Biological Controls.

Newspaper or Other 

Recycled Paper

Synthetic

Includes newspaper and other recycled paper

such as cardboard, without glossy or colored 

inks. Does not include paper that is not recycled 

(i.e., virgin paper).

Permitted as mulch or as a compost feedstock.

Reference: 7 CFR 205.601(b) & 205.601(c)
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Oils, Plant and Animal Nonsynthetic

Includes, but is not limited to, anise oil, 

bergamont oil, canola oil, castor oil, citronella 

oil, clove oil, corn oil, cottonseed oil, eugenol, 

fish oil, garlic oil (allium sativum), geraniol, 

jasmine oil, jojoba oil, lavandin oil, lemongrass 

oil, linseed oil, mustard oil, neem oil, oil of 

geranium, orange oil, peppermint oil, mint oil, 

sesame oil, soybean oil, and thyme oil.

Reference: 7 CFR 205.105 and 205.203(c)(3)

Oils, Horticultural Synthetic

Narrow range oils are permitted as insecticides 

and for plant disease control as dormant, 

suffocating, and summer oils. Horticultural oils 

do not include benzene, naphthalene, toluene, 

and xylene.

Narrow range oils are defined under § 205.2 as 

petroleum derivatives, predominately of 

paraffinic and naphthenic fractions with 50 

percent boiling point (10 mm Hg) between 

415°F and 440°F. 

Reference: 7 CFR 205.601(e) & 205.601(i)

Oxytetracycline Calcium 

Complex

Synthetic

See Tetracycline.

Oystershell Lime Nonsynthetic

Ground shells from oysters. Calcined oyster 

shell (calcium oxide, quick lime, calcium 

hydroxide) is considered synthetic and is not 

permitted as a fertilizer or soil amendment.

Reference: 7 CFR 205.105; 7 USC §6508

Ozone Gas Synthetic

Permitted as an irrigation system cleaner only.

Reference: 7 CFR 205.601(a)

Paper Synthetic

See Newspaper or Other Recycled Papers.

Peanut Meal Nonsynthetic

Reference: 7 CFR 205.203(c)(3)

Peat Moss Nonsynthetic

Must not contain synthetic wetting agents.

Reference: 7 CFR 205.105

Peracetic Acid Synthetic

For use in disinfecting equipment, seed, and 

asexually propagated planting material.

Also permitted to control fire blight bacteria.

Reference: 7 CFR 205.601(a) & 205.601(i)

Perlite Nonsynthetic

See Mined Minerals.

Petroleum Distillates Synthetic

See Oils, Horticultural.

Pheromones Synthetic

As insect management.

Reference: 7 CFR 205.601(f)

Phosphate Rock Nonsynthetic

Must not be fortified or processed with synthetic 

chemicals. Includes colloidal phosphate rock. 

See also, Mined Minerals.

Reference: 7 CFR 205.203(d)(2)

Pine Resins Nonsynthetic

Reference: 7 CFR 205.105
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Plant Extracts Nonsynthetic

Nonsynthetic plant extracts are allowed.

Reference: 7 CFR 205.105

Plant Protectants Nonsynthetic

Includes, but is not limited to, natural materials 

that protect plants from harsh environmental 

conditions such as frost and sunburn, or from 

infection, or the build-up of dirt on leaf surfaces, 

or injury by a pest. Allowed nonsynthetic plant

protection materials include, but are not limited 

to, diatomaceous earth, kaolin clay, pine oil, 

pine resin, and yucca.

Reference: 7 CFR 205.105

Plants Nonsynthetic

Includes aquatic or terrestrial plants or parts of 

plants such as cover crops, green manures, crop 

wastes, hay, leaves, and straw. Parts of plants 

used as soil amendments and foliar feeds are 

permitted.

Reference: 7 CFR 205.203(c)(3)

Pomace Nonsynthetic

Includes skins, pulp, seeds, and stems of grapes, 

olives, tomatoes, apples, or other fruit.

Reference: 7 CFR 205.203(c)(3)

Potassium 

Bicarbonate

Synthetic

Allowed for plant disease control only.

Reference: 7 CFR 205.601(i)

Potassium Chloride Nonsynthetic

From mined sources only. Must be applied in a 

manner that minimizes chloride accumulation in 

the soil.

Reference: 7 CFR 205.602(e)

Potassium Silicate, 

Aqueous

Synthetic

Allowed as an insecticide and for plant disease 

control. The silica used in the manufacture of 

potassium silicate must be sourced from 

naturally occurring sand.

Reference: 7 CFR 205.601(e) &205.601(i)

Potassium Sulfate Nonsynthetic

Only if from langbeinite or evaporated from 

natural brine. See also, Mined Minerals.

Synthetic sources of potassium sulfate are 

prohibited.

Reference: 7 CFR 205.203(d)(2)

Potting Soil Nonsynthetic or 

Synthetic

Must be composed entirely of allowed 

nonsynthetic materials or synthetic materials 

from § 205.601 permitted as plant and soil 

amendments. Must not contain synthetic wetting 

agents. 

Reference: 7 CFR 205.105 & 205.601

Predators and Parasites Nonsynthetic

Augmentation or introduction of predators or 

parasites of a pest species is permitted. See also, 

Biological Controls.

Reference: 7 CFR 205.206(b)(1)

Propolis Nonsynthetic

Resinous mixture produced by honeybees.

Reference: 7 CFR 205.105

Pseudomonas sp. Nonsynthetic

Includes P. putida, P. fluorescence, P. syrigae, 

and P. aeruginosa. See also, Microbial 

Biopesticides.

Reference: 7 CFR 205.105
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Pumice Nonsynthetic

Volcanic rock. See also, Mined Minerals.

Reference: 7 CFR 205.203(d)(2)

Pyrethrum Nonsynthetic

Pyrethrum is an allowed natural botanical 

extract; pyrethroids are synthetic and prohibited. 

Synthetic solvents used for extraction of 

pyrethrum must not be present in the final 

product. Piperonyl butoxide may not be used as 

a synergist. 

Reference: 7 CFR 205.105

Quassia amara Nonsynthetic

Reference: 7 CFR 205.105, 205.206(e)

Rhizobium spp. Nonsynthetic

Includes symbiotic bacteria that form nodules on 

the roots of legumes and fix nitrogen. See 

Inoculants.

Reference: 7 CFR 205.105

Rice Hulls Nonsynthetic

See Plants.

Rotenone Nonsynthetic

The EPA has not registered for sale any 

rotenone products in the United States.

Reference: 7 CFR 205.105, 205.206(e)

Ryania Nonsynthetic

Reference: 7 CFR 205.105, 205.206(e)

Sabadilla Nonsynthetic

Reference: 7 CFR 205.105, 205.206(e)

Sand Nonsynthetic

See Mined Minerals.

Saponins Nonsynthetic

See Plant Extracts.

Sawdust Nonynthetic

From untreated and unpainted wood only. See 

also, Plants.

Reference: 7 CFR 205.203(c)(3)

Sea Salt Nonsynthetic

Reference: 7 CFR 205.105 & 205.203(d)(3)

Seaweed and 

Seaweed Products

Nonsynthetic or 

Synthetic

See Aquatic Plant Products.

Seed Preparations Nonsynthetic

Nonsynthetic materials are allowed for use on 

seeds before planting, including, but not limited 

to, microbial products, kelp, yucca, gypsum, 

plant extracts and various clays. 

Reference: 7 CFR 205.105

Selenium Synthetic

Permitted as a plant or soil amendment. Soil 

deficiency must be documented by testing. Not 

to be used as a defoliant, herbicide, or dessicant. 

Allowed forms include sulfates, carbonates, 

oxides, or silicates of selenium. Those made 

from nitrates or chlorides are not allowed.

Reference: 7 CFR 205.601(j)(6)

Shellfish Meal Nonsynthetic

May not contain prohibited stabilizers or 

preservatives.

Reference: 7 CFR 205.105
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Soap Synthetic

The following soaps are permitted:

Soap-based algicide/demossers, as an algicide, 

disinfectant, and sanitizer, including irrigation 

system cleaning systems.

Soap-based herbicides, for use in farmstead 

maintenance (roadway, ditches, right of ways, 

building perimeters) and ornamental crops.

Soaps, ammonium. Includes ammonium salts of 

fatty acids. Only permitted for use as a large 

animal repellant only, no contact with soil or 

edible portion of crop.

Insecticidal soaps.

Reference: 7 CFR 205.601(a), 205.601(b), 

205.601(d), and 205.601(e)

Soda Nonsynthetic

Sodium carbonate. Unprocessed mined sources 

are allowed. See also, Mined Minerals.

Reference: 7 CFR 205.203(d)(2)

Sodium Bicarbonate Nonsynthetic

See Mined Minerals.

Sodium Carbonate 

Peroxyhydrate

Synthetic

Permitted as algicide, disinfectants, and 

sanitizer, including irrigation system cleaning 

systems.

Federal law restricts the use of this substance in 

food crop production to approved food uses 

identified on the product label.

Reference: 7 CFR 205.601(a)

Sodium Chloride Nonsynthetic

Table salt. Mined sources and evaporation from 

natural brines only. Must not contain synthetic 

anti-caking agents not provided for at § 205.601.

Reference: 7 CFR 205.105

Sodium Hypochlorite Synthetic

See Chlorine Materials.

Sodium Silicate Synthetic

Permitted as a floating agent in postharvest 

handling of tree fruit and fiber processing.

Reference: 7 CFR 205.601(l)

Sorghum Nonsynthetic

See Plants.

Soybean Meal Nonsynthetic

Reference: 7 CFR 205.203(c)(3) 

Sphagnam Moss Nonsynthetic

Must not contain synthetic wetting agents.

Reference: 7 CFR 205.105

Spinosad Nonsynthetic

Derived from Saccharopolyspora spinosa. See 

also, Microbial Biopesticides.

Reference: 7 CFR 205.105

Sticky Traps and 

Barriers

Synthetic

Permitted for insect control.

Reference: 7 CFR 205.601(e)

Stone Meal Nonsynthetic

See Mined Minerals.
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Straw Nonsynthetic

Reference: 7 CFR 205.203(c)(3)

Sucrose Octanoate Esters Synthetic

Sucrose octanoate esters (CAS #s—42922–74–

7; 58064–47–4).

Permitted as an insecticide. Must be used in 

accordance with approved labeling.

Reference: 7 CFR 205.601(e)

Sugar Nonsynthetic

Reference: 7 CFR 205.203(c)(3)

Sulfate of Potash Magnesia Nonsynthetic

From mined sources only. See also, Mined 

Minerals.

Reference: 7 CFR 205.203(d)(2)

Sulfur Synthetic or 

Nonsynthetic

Synthetic elemental sulfur is permitted as an 

insecticide, for plant disease control, and as a 

plant or soil amendment. 

Nonsynthetic sulfur is allowed without 

restriction for use.

Reference: 7 CFR 205.601(e), 205.601(i), & 

205.601(j)

Sulfurous Acid Synthetic

Sulfurous acid (CAS # 7782–99–2) for on-farm 

generation of substance utilizing 99% purity 

elemental sulfur § 205.601(j)(2).

Reference: 7 CFR 205.601(j)

Talc Nonsynthetic

See Mined Minerals.

Tankage Nonsynthetic

The rendered, dried, and ground by-products 

that are largely meat and bone from animals that 

are slaughtered or that have died otherwise. See 

Meat By-Products and Waste.

Reference:7 CFR 205.105

Trace Minerals Nonsynthetic or 

Synthetic

See Mined Minerals or a specific micronutrient: 

Boron, Cobalt, Copper Products, Iron, 

Manganese, Molybdenum, Selenium, or Zinc.

Trichoderma Species Nonsynthetic

Includes T. asperellum, T. atroviride, T. 

fasciculatum, T. gamsii, T. hamatum, T. 

harzianum, T. koningii, T. reesie, T. virens, and 

T. viride. See also, Microbial Biopesticides.

Reference: 7 CFR 205.105

Vegetable Protein 

Hydrolysate

Nonsynthetic

Vegetable matter, including soy, that has been 

hydrolyzed through heat, pressure, steam, or 

enzymes is allowed. Acid hydrolyzed vegetable 

protein is prohibited.

Reference: 7 CFR 205.105

Vermicompost Nonsynthetic

Vermicompost that meets the following criteria 

may be used without restriction: 1) Made only 

from allowed feedstocks, 2) Aerobic conditions 

are maintained by regular additions of layers of 

organic matter, turning, or employing forced air 

pipes such that moisture is maintained at 70-

90%, and 3) The duration of vermicomposting 

is sufficient to produce a finished product that 

does not contribute to contamination of crops, 

soil, or water by plant nutrients, pathogenic 

organisms, heavy metals, or residues of 

prohibited substances.

Reference: 7 CFR 205.203(c) & NOP 5021
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Vermiculite Nonsynthetic

See Mined Minerals.

Vinasse Nonsynthetic

Nonsynthetic vinasse is permitted. Vinasse is 

classified as nonsynthetic if it does not contain 

prohibited additives, such as pH adjustors, 

sanitizers, ammonium compounds, antibiotics or 

chlorine materials and is not fortified with 

nitrogen.

Reference: 7 CFR 205.105; NOSB Formal 

Recommendation, May 2, 2014.

Vinegar Nonsynthetic

Produced through the fermentation of ethanol by 

acetic acid bacteria. See also, Acetic Acid.

Reference: 7 CFR 205.105

Viruses Nonsynthetic

See Biological Controls.

Vitamins B1, C, E Synthetic

Permitted as plant or soil amendments.

Vitamin C is also called "Ascorbic Acid.”

Reference: 7 CFR 205.601(j)

Vitamin D3 Synthetic

Also called “Cholecalciferol.” Permitted as a 

rodenticide.

Reference: 7 CFR 205.601(g)

Water and Wastewater Nonsynthetic

Water and wastewater is permitted, provided 

that it is used in a manner that does not 

contribute to contamination of crops, soil, or 

water by plant nutrients, pathogenic organisms, 

heavy metals, or residues of prohibited 

substances.

Reference: 7 CFR 205.105

Wetting Agents Nonsynthetic

Nonsynthetic wetting agents, including saponins 

and microbial wetting agents, are allowed.

Reference: 7 CFR 205.105

Wheat Middlings Nonsynthetic

See Plants.

Whey Protein Nonsynthetic

Reference: 7 CFR 205.105

Wood Ash Nonsynthetic

Wood ash must be produced from untreated and 

unpainted wood. Wood stove ashes must not be 

generated from burning of colored paper, 

plastic, or other prohibited materials. See also, 

Ash.

Reference: 7 CFR 205.203(d)(4)

Wood Chips and Shavings Nonsynthetic

From untreated and unpainted wood only.

Reference: 7 CFR 205.203(c)(3)

Wool Nonsynthetic

Reference: 7 CFR 205.105

Worms and Worm Castings Nonsynthetic

See Vermicompost.

Yeast Nonsynthetic

Yeast must not be produced using excluded 

methods. Includes Saccharomyces cerevisia, 

yeast extract autolysate, and yeast hydrolysate. 

See also, Microbial Products.

Reference: 7 CFR 205.105

Yucca Nonsynthetic

See Plant Extracts.
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Zeolite Nonsynthetic

See Mined Minerals.

Zinc Synthetic

Permitted as a plant or soil amendment. Soil 

deficiency must be documented by testing. Not 

to be used as a defoliant, herbicide, or dessicant. 

Allowed forms include zinc sulfate (ZnSO4), 

zinc oxide (ZnO), zinc carbonate (ZnCO3), and 

zinc silicate. Those made from nitrates or 

chlorides are not allowed.

Reference: 7 CFR 205.601(j)(6)
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Index of Substances

Acetic Acid

Agar

Agricultural Substances

Alcohol

Alfalfa Meal or Pellets

Algae

Almond Hull Trash

Aloe Extract

Amino Acids

Ammonium Carbonate

Animal By-Products and Materials

Aquatic Plant Products

Arthropods

Ash

Attapulgite Clay

Azadirachta Indica

Bacillus Species

Bagasse

Bark

Basalt

Beauveria bassiana

Beeswax

Bentonite

Biochar

Biodegradable Biobased Mulch Film

Biodynamic Preparations

Biological Controls

Biotite

Blood Meal

Bone Char

Bone Meal

Borates and Borax

Boric Acid

Boron

Brewer’s Waste

Calcium

Calcium Carbonate

Calcium Chloride

Calcium Hydroxide

Calcium Hypochlorite

Calcium Lignosulfonate

Calcium Polysulfide

Calcium Sulfate

Cannery Wastes and Cannery Waste Water

Capsaicin

Cardboard

Carnauba Wax

Castor Oil

Chalk

Chelating Agents

Chitin

Chlorine Dioxide

Chlorine Materials

Citric Acid

Clay

Cobalt

Cocoa Bean Hulls

Coconut Fiber

Coffee Grounds

Compost

Compost Inoculants

Compost Tea

Copper, Fixed

Copper Products

Copper Sulfate

Corn Gluten

Corn Steep Liquor and Solids

Cotton Gin Trash

Cottonseed Meal

Crab Meal

Crop Residues

Cytokinins

Dairy Products

Diatomaceous Earth

Dolomite

Dormant Oils

Eggshell Meal

Elemental Sulfur

Enzymes

Epsom Salts

Ethanol

Ethylene Gas

Fatty Acids

Feather Meal

Feldspar

Fermentation Products
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Ferric and Ferrous Compounds

Ferric Phosphate

Fish Meal and Powder

Fish Products, Liquid

Food Processing By-Products

Fuller’s Earth

Fulvic Acids

Fungal Preparations

Garlic and Garlic Oil

Gibberellic Acid

Gluconic Acid

Granite Dust

Green Manure

Greensand

Growth Regulators

Guano

Gums

Gypsum

Homeopathic Preparations

Hoof and Horn Meal

Horticultural Oils

Humates

Humic Acids

Hydrated Lime

Hydrogen Chloride

Hydrogen Peroxide

Inert Ingredients

Inoculants

Insect Extracts

Iron

Iron Phosphate

Isopropanol

Kainit

Kaolin Clay

Kelp and Kelp Meal

Kieserite

Lactic Acid

Lactose

Langbeinite

Leaf Mold

Lecithin

Leonardite

Lignin Sulfonate

Lignite

Lime Sulfur

Limestone

Limonene

Magnesium Carbonate

Magnesium Chloride

Magnesium Rock

Magnesium Sulfate

Magnetite

Maltodextrin

Manganese

Manure

Manure Tea

Marl

Meat By-Products and Waste

Mica

Microbial Biopesticides

Microbial Products

Micronutrients

Milk

Mined Minerals

Molasses

Molybdenum

Montmorillonite Clay

Mulch

Muriate of Potash

Mushroom Compost and Spent Mushroom 

Substrate

Mycchorhizae

Neem and Neem Derivatives

Nematodes

Newspaper or Other Recycled Paper

Oils, Plant and Animal

Oils, Horticultural

Oxytetracycline Calcium Complex

Oystershell Lime

Ozone Gas

Paper

Peanut Meal

Peat Moss

Peracetic Acid

Perlite

Petroleum Distillates

Pheromones

Phosphate Rock

Pine Resins

Plant Extracts
United States Department of Agriculture 1400 Independence Avenue SW. NOP 5034-1

Agricultural Marketing Service Room 2646-South Building Effective Date: December 2, 2016

National Organic Program Washington, DC 20250 Page 24 of 24

File Name: NOP 5034-1 Materials for Organic Crop Production 12/02/2016 Authorized Distribution: PUBLIC

Plant Protectants

Plants

Pomace

Potassium Bicarbonate

Potassium Chloride

Potassium Silicate, Aqueous

Potassium Sulfate

Potting Soil

Predators and Parasites

Propolis

Pseudomonas sp.

Pumice

Pyrethrum

Quassia amara

Rhizobium spp.

Rice Hulls

Rotenone

Ryania

Sabadilla

Sand

Saponins

Sawdust

Sea Salt

Seaweed and Seaweed Products

Seed Preparations

Selenium

Shellfish Meal

Soap

Soda

Sodium Bicarbonate

Sodium Carbonate Peroxyhydrate

Sodium Chloride

Sodium Hypochlorite

Sodium Silicate

Sorghum

Soybean Meal

Sphagnam Moss

Spinosad

Sticky Traps and Barriers

Stone Meal

Straw

Sucrose Octanoate Esters

Sugar

Sulfate of Potash Magnesia

Sulfur

Sulfurous Acid

Talc

Tankage

Trace Minerals

Trichoderma Species

Vegetable Protein Hydrolysate

Vermicompost

Vermiculite

Vinasse

Vinegar

Viruses

Vitamins B1, C, E

Vitamin D3

Water and Wastewater

Wetting Agents

Wheat Middlings

Whey Protein

Wood Ash

Wood Chips and Shavings

Wool

Worms and Worm Castings

Yeast

Yucca

Zeolite

Zinc