Boron humateis black powder or granular, slightly soluble in water and good soluble in alkaline solution, which perfectly combines humic acids and nutrients at different levels of availability. humate is extracted from natural lignite or leonardite. it Saudi industrial export company delivers high quality granular sulphur in jumbo bags and 25 kg packing from saudi arabia to asia, africa and europe with more than 27 years of experience in exports siec also handles exports of bulk sulphur from saudi arabia with competitive prices due to the long term relation with saudi aramco. Alibaba offers 149 boron humate powder products. about 1% of these are vitamins, amino acids and coenzymes. a wide variety of boron humate powder options are available to you, such as medicine grade, food grade, and agriculture grade. About 73% of these are organic fertilizer. a wide variety of organic boron humate fertilizer options are available to you, such as humic acid, compost, and seaweed. you can also choose from powder, granular, and liquid. as well as from quick, slow, and controlled. and whether organic boron humate fertilizer is free samples, or paid samples.