The killer application for earthworm castings is bioavailability: not only are they rich in water-soluble nutrients and trace elements, those elements are in their simplest, easiest-to-uptake form, for rapid root growth and optimum nutrition. 100% natural, this odourless, non-burning amendment increases water retention and improves aeration.

Total Nitrogen (N) 1%
0.1% Water Soluble Nitrogen
0.9% Water Insoluble Nitrogen
Calcium (Ca) 1%
Iron (Fe) 0.2%

Pro-tip: Use one part to 4 parts soil and top dress with 1” of worm castings for best results.
Earthworm castings (1-0-0) are one of nature's most abundant and effective fertilizers. A rich, odorless, all-natural organic product that is extremely cost-effective because you use just a little to achieve big results. Four sizes available. Strong customer recognition and loyalty.