Certified Organic Worm Castings Fertilizer and Liquid Plant Food. Use/application guides and information provided. Florida Local deliver and freight quotes. Bulk quantities and retail packaging available. Pure Black Castings™ are 99.9% ALL castings and are recognized as the gold standard of earthworm castings. VermaPlex®, now a legend in the horticulture community, contains the highest microbe content on the market. VermaMax LE®, our newest liquid extract, is achieving remarkable results for growers. Customer service and satisfaction is major focus.