Boron Fertilizers for Organic Agriculture

Compare boron nutrient sources for organic crop nutrition programs, including OMRI Listed Solubor and Optibor boric acid powder. Custom Hydro Nutrients offers Solubor, boric acid, and Fertibor in package sizes for small-volume preparation through commercial use.

Compare boron sources and package sizes

• Solubor: 20.5% guaranteed boron as disodium octaborate tetrahydrate. Available in 8 oz, 1 lb, 4 lb, 20 lb, and 50 lb packages. Review product directions for foliar and fertigation applications.
• Optibor boric acid powder: 99.9% pure orthoboric acid supplying 17.5% boron. Available in 8 oz, 1 lb, 4 lb, and 55 lb packages for measured nutrient preparation.
• Fertibor: granular disodium tetraborate pentahydrate with 15.2% typical boron. Available in 1 lb, 4 lb, and 50 lb packages. Listed uses include fertilizer formulation, growing-media incorporation, and crop-specific direct soil application.

Select by analysis and application method

These products differ in boron concentration, chemical form, and application directions. They are not interchangeable by product weight. Base boron additions on crop-specific recommendations and relevant soil, water, or tissue analysis, accounting for boron supplied by other inputs.

Follow the individual product label for application rates, timing, mixing, and handling. Consult a qualified crop advisor or agronomist when selecting a source and planning your nutrient program.

Product information for organic agriculture

OMRI Listed describes an input's listing for use in organic agriculture; it is not a claim that the fertilizer itself is certified organic. Review the current listing, product directions, and any applicable use restrictions for the specific product before purchase and use. Check proposed inputs with your organic certifier.

Browse the product listings below for specifications, package options, and available technical documents.