Granular boron offers a low rate of product per acre, while still delivering more feeding sites for the plant roots to take up nutrients please conduct a soil sample to determine if your soil will be responsive to a granular micronutrient application. 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. Nov 27, 2019u00a0u00b7 life extension boron is a good boron product that uses an advanced chelate complex with added riboflavin (vitamin b2). itu2019s affordable, easy to use, and packaged in vegetarian capsules. specs. 3mg boron per serving. 25mg riboflavin (vitamin b2) per serving. advanced chelate complex formula. affordable. good reviews. 100% water soluble, granubor, granular fertilizer mix. add boron in soil for long lasting benefit to your plants. #1 choice for organic farmers worldwide. made especially for bulk blendersa pure, 100% water-soluble micronutrient that meets boron demand during the growing season.