Lettuce Fertilizer 8 15 36 Water Soluble Leafy Green Formula 1 Pound by Greenway Biotech, Inc. Boca Hydro LLC Amazon.com : Greenway Biotech, Inc. Lettuce Fertilizer 8 15 36 Powder Water Soluble with Chelated Micronutrients for Lettuce Kale Spinach Microgreens Helps Prevent Tip Burn Hydroponics or Soil 1 LB : Patio, Lawn & Garden Boca Hydro LLC Bulletin E 3507 Introduction to Fertilizer Planning for Vegetables Developing and Educating Managers and New Decision makers (DEMaND) 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