What we make
Everything we sell comes out of our own bins. Our castings are 100% worm castings with no fillers, no blended compost and nothing bought in, screened to 1/8 inch so they are ready to use straight from the bag.
Our composting worms are the same red wigglers that make the castings: healthy, active and used to a clean, plant-based diet.
How we work
Good castings can't be rushed. The worms digest their bedding over several months, building humus and a dense microbial community. We harvest in small batches so what you receive is fresh and biologically active, never stockpiled.
Every batch is screened fine to remove bedding and cocoons, then bagged by hand and dated.
Who it's for
Home gardeners blending a better potting mix, growers top-dressing beds and orchards, and nurseries and farms that want a consistent biological amendment by the pallet. Bulk and wholesale pricing is available by email.
Get in touch
Questions about your soil, an order, or a quantity that isn't in the shop: write to hello@blackgoldwormco.com and a real person will reply.
Updated October 21, 2026