Alibaba offers 1,159 organic boron fertilizer products. about 71% of these are organic fertilizer, 2% are other fertilizers, and 1% are nitrogen fertilizer. a wide variety of organic boron fertilizer options are available to you, such as humic acid, seaweed, and compost. Fertibor boron, mined and purified boron, should be used in very small amounts (2-10 lb/acre) because it can become toxic to plants if over-applied. fertibor is a slow release, 15% boron for soil application. highly soluble; to calculate them amount of fertibor required, multiply the elemental boron required by 6.6 (based on a soil test) Alibaba offers 799 agriculture granular boron fertilizer products. about 63% of these are nitrogen fertilizer, 6% are organic fertilizer, and 3% are other fertilizers. a wide variety of agriculture granular boron fertilizer options are available to you, such as organic fertilizer, nitrogen fertilizer, and other fertilizers. A wide variety of boron fertilizer for sale options are available to you, such as organic fertilizer, nitrogen fertilizer, and other fertilizers. you can also choose from powder, liquid, and granular. as well as from quick, controlled, and slow. and whether boron fertilizer for sale is humic acid, seaweed, or calcium nitrate.