Improve germination, root health and increase water retention with 100% organic odorless earthworm castings. * Perfect for indoor and outdoor use * Made in the USA * People and pet friendly * Best results when paired with other BugHut products Worm castings are great for indoor and outdoor plants, seedlings and even lawns. They contain beneficial microbes that help plants fight disease, while also providing nutrients to allow your plants to thrive. The best part.... you can't overdo it. Although worm castings are considered a natural fertilizer, it won't burn your plants regardless of how much you use.