Jack's Nutrients 5-12-26 Part A - 2.2 lbs.In Store Location: @D16 An improvement on the classic "Part A" formula for general vegetative growing. This redesigned blend is built with purely soluble and available nutrients to allow the grower maximum flexibility. Specific balance of macro, secondary and micronutrients delivers an efficient combination of nutrients suitable for many different growing environments and crop types. And don't forget 15 0 0 Cal Nit Part B of this two part system!