Where to Buy Earthworm Castings - A Complete Guide

If you’re in the market for a powerful soil supplement that is all-natural and organic, you may be trying to find some earthworm castings. Worm castings are fantastic and work well on all different kinds of plants. They’ve been somewhat of a “hidden secret” in the gardening community for years now.

In recent years, with the expansion of the organic gardening and farming markets, they have seen a jump in popularity. While you’re definitely on the right track, finding a place to buy good earthworm castings can be a challenge.

They’re not widely available in all areas at any given time, and you can’t exactly find them on every shelf. If you’re just being introduced to the idea of worm castings or you haven’t found a good source to buy them yet, here are a few places you can try. Also, if you think all worm castings are the same, you are wrong (quality-wise); find out more here.


One local place that you can try to find earthworm castings is a nursery. They often sell great fertilizers and soil supplements and have a decent selection. If it’s a more established nursery with a storefront, there’s a better chance that they’ll have worm castings available.

Gardening Centers

Gardening stores are another good place to find earthworm castings in different varieties. Since they specialize in gardening products and cater to a more specific customer base, they may be the best local option to pursue when you need a bag of worm castings. The downside to this approach is that you can’t usually get large quantities. They might have 15 or 30 pound bags on hand. This means you’d have to buy several small bags if you need a lot.

Classified Ads and Farmer’s Markets

If you don’t mind buying directly from an individual, this might be a good option to consider. Local producers often simply bag up their worm castings and take them to the farmer’s market or try to sell them on Craigslist. This can sometimes be a good source of quality, fresh castings. However, it may not be consistent and there are no guarantees on the quality of the finished product. If you find a good local source like this though, it could be valuable over the long-term if you do a lot of gardening or growing of any kind.

Simple Grow Online Store

Personally, we like the Simple Grow online store the best when it comes to buying worm castings. Yes…we’re probably biased, but we think you will like it the best too once you give it a try. You can get any amount you want from a tiny 5lb bag, all the way up to a one-ton super sack. In fact, you could get multiple tons of worm castings if you want.

With a few clicks of a mouse, you’re all done and the worm castings will be on their way shortly after that. The best part is you never have to worry about the quality of the castings, as you get the same amazing worm castings every time. Your plants will be amazed and basically beg for more.



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