We may receive a commission on purchases made from links. It may be hard to wrap your head around the garden value of worm castings — the waste produced by lowly earthworms. They're collected from ...

To worm or not to worm? When it comes to composting, that's the question many savvy gardeners are pondering these days, and for good reason: Worm castings — a.k.a. poop — are the nutrient-rich organic ...