Harrell's uses premium raw materials which are totally soluble and provide the highest quality finished products. This guarantees that products go into solution quickly with no residues to clog nozzles. Custom formulations for individual growing operations allow precision nutritional applications. Batch manufacturing system which hand weighs each ingredient before processing provides a precise mix with maximum accuracy. Quality control is job one. Each batch of material is checked for total solubility and chemical analysis to ensure the grower gets the right material.
20-20-20, 20-10-20, 21-7-7 and 17-5-17 are manufactured by Van Iperen using the cleanest raw materials on the market.