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, 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 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 30 0 0 NPK Liquid Fertilizer Case (12 Quarts) How To Mix Hydroponic Nutrient Solution For Lettuce Hydroponic Nutrient Solution Masterblend