Urban Farm Fertilizers Apples & Oranges. Fruit & Citrus Fertilizer. 1 Gallon. Makes 256 gals. Hand-crafted, Micro-brewed liquid fertilizer for all fruit and citrus. 4.5-2.0-4.2 NPK. Super-concentrated: 256:1. One gallon makes 256 gals of full strength fertilizer. 100% complete, 100% water soluble, precision formulated and blended. Made from organic components, mycorrhizae, humic acid, kelp, enzymes, and minerals. Calcium rich! Critical for size, juiciness, and flavor in fruit and citrus.