Urban Farm Fertilizers Apples & Oranges Fruit and Citrus Fertilizer, 1/2 gallon. Hand-crafted, Micro-brewed liquid fertilizer for all fruit and citrus. 4.5-2.0-4.2 NPK. Super-concentrated: 256:1. One-half gallon makes 128 gals of full strength fertilizer. For drip, hand-watering, hose-end, foliar, in soil, containers, and hydroponics. Made from organic components, mycorrhizae, worm casts, humic acid, kelp, enzymes, and minerals. Calcium rich! Critical for size, juiciness, and flavor in fruit and citrus.