MasterBlend 4-18-38 Tomato Vegetable Fertilizer COMBO KIT - 2.5 lb A total of 2.5 lbs of fertilizer which will make approximately 240 gallons. Each Kit includes: MasterBlend 4-18-38, Magnesium Sulfate, and Calcium Nitrate in 1 Kit Direct from MasterBlend - Fertilizer for Tomatoes and Vegetables Easy to use - contains 2.5 pounds (Makes 240 gallons!) Highly concentrated! 2-Parts (Part 1: 4-18-38 + Epsom Salt, Part 2: Calcium Nitrate) Master Blend fertilizer is perfect for Hydroponics and Soil gardens MasterBlend fertilizers have been the go-to Hydroponic and Garden fertilizers for commercial gardeners for a long time. Their 4-18-38 Tomato and Vegetable Fertilizer provides proven results time after time. Because of the unique composition, it is recommended to use the 4-18-38 together with Magnesium Sulfate (Epsom Salt) and Calcium Nitrate for the ultimate balanced water soluble fertilizer. Now you can purchase all three components in and easy to use 2-part Nutrient Set directly manufactured by MasterBlend. The kit combines the 4-18-38 with the Magnesium Sulfate which results in an NPK ratio of 5-12-25 in the recommended dose, as well as a separate container of Calcium Nitrate (15.5-0-0, which should not be mixed directly with Part 1). Simply use the included pre-measured scoop and dissolve part 1 in water, then part 2 and you will have a Fertilizer that will grow incredible plants and vegetables. Kit contains a total of 2.5 lbs of fertilizer which will make approximately 240 gallons.