Questions? We've dug up some answers.
The basics
What exactly are worm castings?
Worm castings (a.k.a. vermicompost) are what's left after earthworms digest organic matter like plant material and kitchen scraps. The result is dark, crumbly, and packed with nutrients and beneficial microbes. More in Castings 101.
What's the difference between compost and castings?
Compost is made by microbes breaking down a pile of organic matter over time. Castings are made by worms digesting it, which concentrates nutrients and beneficial microbes and makes them easier for plants to use right away. See the side-by-side.
Why does the label say 1-0-0? Isn't that low?
It is, and that's normal. N-P-K measures raw nitrogen, phosphorus and potassium. The value of castings is in what that test doesn't measure: organic matter, beneficial microbes, trace minerals and slow-release nutrients. The full explanation.
Do castings smell?
Not like you'd think. Castings are low odor, which is why they're perfect for indoor plants.
Are they safe around kids and pets?
Yes. Castings are all natural, with nothing synthetic, and safe to use around people, pets and wildlife.
Using castings
Can I use too much?
Nope. Castings can't burn your plants, so feel free to be generous. A little goes a long way, but more never hurts.
How much should I use?
Top-dress established plants once or twice a year. Mix about one gallon into every 50 square feet of garden bed. Blend 20–50% into potting mix (10–20% for plants that aren't fruiting), and add a handful or two to each hole when transplanting. Everything's in the how-to guide.
What is compost tea?
AACT, or actively aerated compost tea, is our castings brewed with air and water into a liquid full of beneficial microbes. Use it as a spray on leaves or pour it at the roots. Ask us about availability.
Our worms & ordering
What do you feed your worms?
A varied diet: coffee grounds from Nunatak Coffee, kitchen scraps (some from our neighbors), and every leftover pumpkin we can get our hands on in the fall. A varied diet in means better nutrients out.
Do you sell worms?
Yes. We sell live red wigglers (Eisenia fetida) seasonally. They're perfect for starting or expanding a bin of your own. Call or text for current availability and pricing.
How do I order?
Call or text 608-800-7286 or email Matthew@mattswormfarm.com. We sell locally, with pickup in Beaver Dam and the surrounding area, and we'll work out the details when you reach out.
Ready to dig in?
Call, text or email. We answer every message ourselves.