Does Worm Composting Smell

A properly balanced composting bin, yes even with the worms in it, should have a good, earthy smell. It shouldn’t smell much different than rich garden soil. You might think that worm castings (aka “black gold”) might emit a foul odor like other animal dung, but it simply isn’t the case.

Why does my worm compost smell bad?

Most bad smells are caused by anaerobic bacteria. Good aeration is key in keeping odors down in the worm bin. Sometimes getting in and fluffing up the bedding can help keep things aerated. Too much moisture can also cause bad smells.

What does worm poop smell like?

In the dirt, earthworms eat soil and organic matter and turn it into richer soil. In a home composter like mine, they can do the same with kitchen scraps, taking a mix of vegetable and fruit trimmings, along with paper and other filler, and turning it into black, sweet, earthy-smelling . . . well, worm poop.