Technical Grade Epsom Salts to add magnesium to your fertilizer blend. Usually paired with Calcium Nitrate and Masterblend Lettuce Formula to offer a 3-part nutrient mix.

Note: Do not directly mix all three nutrients (Calcium, Magnesium, and MasterBlend Mix) together in high concentrations or Calcium will precipitate out of the mixture as a solid. Masterblend and Magnesium Sulphate can be mixed with hot water to ease dissolving (A-Solution) and Calcium Nitrate should be used as a second dosing solution (B-Solution).