MasterBlend 4-18-38 Complete Combo Kit vs Supply Solutions Calcium Nitrate 15.5-0-0

Buy the MasterBlend kit if you want a complete, balanced feeding program for tomatoes or other fruiting vegetables, especially in hydroponics. Buy the Supply Solutions calcium nitrate only if you already have a high-phosphorus and potassium source and just need calcium and nitrogen. The MasterBlend kit is the better all-rounder: it bundles the three components in the correct 1:1:0.5 ratio and is widely used by hydroponic growers. The Supply Solutions bag is a single nutrient, so it cannot feed a plant on its own.

• Choose the MasterBlend kit if you want one box with all three components in the right ratio for a complete tomato or hydroponic feed.
• Choose the Supply Solutions calcium nitrate if you already have a bloom and fruiting fertilizer and only need calcium and nitrate nitrogen, or you want a large bag for foliar and blossom end rot correction.