Solubor Boron Fertilizer | 20.5% Water-Soluble Boron

Shop Solubor boron fertilizer for water-soluble nutrient preparation. Solubor supplies 20.5% guaranteed boron (B) as disodium octaborate tetrahydrate, with package options for small batches through commercial fertigation and fertilizer formulation.

Soluble boron for nutrient programs

Solubor is an ultra-fine boron material from U.S. Borax for label-directed fertigation and foliar applications, and for hydroponic nutrient formulation. Review the product directions and technical information for your intended application and concentration.

Choose from five package sizes

• 8 oz: the smallest option for low-volume nutrient preparation.
• 1 lb: a compact package for smaller nutrient programs.
• 4 lb: an intermediate size for recurring solution preparation.
• 20 lb: a larger package for commercial nutrient programs.
• 50 lb bag: a bulk option for high-volume operations and fertilizer formulation.

Calculate boron additions precisely

Use the 20.5% guaranteed boron analysis when calculating product requirements. Account for boron already present in source water and other fertilizers, and select rates using crop-specific recommendations and relevant analysis. Follow product directions and consult a qualified crop advisor or agronomist for application rates.

Review stock-solution requirements

Check technical guidance for dissolution, water temperature, concentration limits, and compatibility before preparing concentrated stocks or fertilizer blends. Do not assume that suitability at a working dilution establishes compatibility in a concentrated stock. Consult the individual product page and safety data sheet for handling and storage details.