In a natural ecology, red worms, or red wigglers feed on leaf litter, which is the surface of the soil that comprises dead plants, leaves, and animal remnants. As red worms consume decaying debris, they excrete castings that are rich in nitrogen, phosphate, and potassium.
Worm castings are collected from compost bins and used in gardens and houseplants as fertilizer. Red worm castings are...
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