Boric Acid Powder | Water-Soluble Boron

Shop Optibor boric acid powder for water-soluble boron nutrition in hydroponic and fertigation programs. This collection includes 8 oz, 1 lb, 4 lb, and 55 lb packages for small-batch nutrient preparation through commercial operations.

17.5% boron for nutrient formulation

Optibor TG is technical-grade orthoboric acid (H₃BO₃), listed in our product specifications at 99.9% purity and 17.5% boron. Compare individual product specifications and directions when selecting a boron source for your nutrient program.

Choose your package size

• 8 oz: the smallest package for low-volume nutrient preparation.
• 1 lb: a compact option for smaller nutrient programs.
• 4 lb: an intermediate package for recurring solution preparation.
• 55 lb bag: a bulk option for commercial nutrient preparation.

Formulate and apply precisely

Base boron additions on crop-specific recommendations, source-water analysis, and the boron already supplied by other fertilizers. Follow product directions and use accurate weighing and dilution procedures. Review concentration limits and mixing instructions before preparing stock solutions; do not assume that solubility at a working dilution applies to a concentrated stock.

Optibor is also OMRI Listed for use in organic agriculture. Consult the individual product information and safety data sheet for application, handling, and storage details.