Lettuce Nutrient Npk A 8 0 0 E B 0 6 12 Liquid Amazon.com : Covington 30 0 0 NPK Liquid Fertilizer (32oz) High Nitrogen Low Salt Lawn Fertilizer Concentrate All Purpose Liquid Formula for Lawns, MasterBlend Lettuce Formula 8 15 36 Fertilizer Buy from PowerGrow PowerGrow Systems & Utah Hydroponics MasterBlend 8 15 36 Lettuce Formula 25 lb. Custom Hydro What is the Best Fertilizer for Lettuce? Greenway Biotech, Inc. You're putting the same fertilizer on every plant in your garden. The lettuce that needs nitrogen for leaves is getting the same feed as the tomato that needs phosphorus for fruit. Different 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