Nutri Kelp Sea Kelp Liquid Fertilizer with Potassium Mirimichi Green 32 Ounce Bottle Bulletin E 3507 Introduction to Fertilizer Planning for Vegetables Developing and Educating Managers and New Decision makers (DEMaND) LESCO 18 3 6 Liquid Fertilizer 50% Controlled Release Nitrogen with Iron MasterBlend 8 15 36 Lettuce Formula 25 lb. Custom Hydro Advanced 16 4 8 Lawn Fertilizer Liquid Lawn Food Spring & Summer Concentrated Spray Any Grass Type Fish and Seaweed Kelp Balanced NPK Simple Understanding NPK: The Three Key Nutrients in Fertilizers When you look at a fertilizer label, you'll often see three numbers. These numbers stand for nitrogen (N), phosphorus (P), and potassium (K). Each