Rock dusts are mined in all regions of the U.S., typically as a by-product of other quarry activities. Benefits are long-lasting, to 5 years or more. Har phosphate is mined in many regions around the world. Mined in Florida, soft-rock phosphate also improves soil moisture retention. Greensand Apply in fall or spring to supply potassium and many trace nutrients.
Greensand also improves soil moisture retention.
Greensand is mined in New Jersey from a geologic marine layer. Copyright 2000, National Gardening Association. All rights reserved. Click here to receive up to four Free estimates from prescreened and insured contractors. All information contained herein is from sources considered reliable.