Jack's Nutrients 5-12-12 Part A, 25 lb Bag

An improved take on the classic Part A formula for general vegetative growing. Every nutrient in this redesigned blend is fully soluble and readily available, giving growers maximum flexibility in how they build their feed program.

Why growers run Jack's Part A

• 5-12-12 balance: a phosphorus- and potassium-forward base suited to structural growth and heavy feeding programs.
• 100% soluble: no particulates, dissolves clean for reservoirs, injectors, and drip systems.
• Complete nutrition: a specific balance of macro, secondary, and micronutrients in every dose.
• Built to flex: efficient across many growing environments and crop types.

How to use

Dissolve in water at the rate your feeding schedule calls for, mixing thoroughly before combining with any Part B or other inputs. Monitor EC and pH after mixing and adjust to your targets.