Cropsalt Granular is a combination of organic and inorganic fertilizer in granular form used to provide complete nutritional needs for up to180 days. Granular contains coated controlled release fertilizer along with organic slow release fertilizer, humics, fulvics, and worm castings. Cropsalt granular provides multiple forms of calcium just like the solubles. CALCIUM IS KEY. There is no product on the market like our granular. We suggest applying at a low to medium rate and reapply if necessary. Container plants with runoff will need a heavier application rate and/or a second application.