Jack’s Nutrients — Professional Water Soluble Fertilizers
Jack’s Nutrients is produced by JR Peters — a family-owned fertilizer manufacturer that has been producing professional-grade water soluble fertilizers since 1947. Made in the USA with heavy-metal-free ingredients, Jack’s represents a bridge between traditional agricultural fertilizer science and modern CEA production demands — proven chemistry used by professional greenhouse and nursery growers for decades, now widely adopted by indoor CEA and specialty crop producers for the same reasons: consistent formula, clean ingredients, and excellent cost-per-gram economics.
Jack’s 3-2-1 Program & Formulations
The Jack’s 3-2-1 program is the most widely used Jack’s formula in CEA production — a combination of Jack’s Part A (3-0-0), Jack’s Part B (calcium nitrate), and Epsom salt that together deliver a complete nutrient profile at excellent cost-per-gallon economics. The simplicity of a three-component program that produces consistent results has made Jack’s 3-2-1 one of the most popular commercial nutrient programs in the North American indoor cultivation market. Jack’s also produces dedicated Bloom, Finish, and application-specific formulas for growers who want a more stage-specific approach. All Jack’s formulations are dry powders that dissolve completely in water — compatible with Dosatron injection, stock tank mixing, and batch preparation approaches.
Jack’s for Commercial Cost-Efficiency
At commercial scale, Jack’s provides among the best cost-per-gram nutrient economics of any professional-grade formula — without sacrificing the elemental balance and purity that consistent production requires. Use our Nutrient Mixing & Dilution Calculator to plan Jack’s 3-2-1 batch mixing for your reservoir volume and EC targets.
Compare Jack’s with other qualified brands in our full hydroponic nutrients collection, explore water soluble fertilizers, or browse Dosatron injectors for inline delivery. Commercial accounts available.
