Fertilizers. u.s. borax, part of rio tinto, is a global leader in the supply and science of borates—naturally-occurring minerals containing boron and other elements. we are 1,000 people serving 500 customers with more than 1,700 delivery locations globally. Soluble boron spray, soluble foliar boron spray solubor225 lb, generic solubor boron, boron spray fertilizer, solubor 20.5, solubor df, solubor boron, drexel beau-ron, beau-ron d, boron spray, we are pest control supplies wholesaler that have diy pest control supply store in suwanee & online pest mall, pestrong will free & fast shipping professional pest control products, Usage: 1 gram for a 10 inch pot. spread far from the tree base. apply 30 days interval. You can also choose from quick, slow, and controlled boron fertilizer there are 3,248 suppliers who sells boron fertilizer on alibaba, mainly located in asia. the top countries of suppliers are germany, china, and malaysia, from which the percentage of boron fertilizer supply is 1%, 94%, and 1% respectively.