Plant-Prod® is the water soluble fertilizer that plants love and trusted by growers across the U.S. from Washington to Maine. We start with only the highest quality ingredients, with formulations that are engineered to meet your plants' specific feeding requirements. Giving you results you'll love. Cut your costs, and increase yields. Since 1945 Plant-Prod has been improving plant productivity. We make chelated iron for plants, calcium nitrate fertilizer, zinc fertilizer, and more. No fillers, no additives.