Why are local worm castings better than those from big box stores? The same reason local produce is better: freshness and quality! We sell our castings the same season they're produced and maintain ideal moisture and oxygen levels. Maintaining adequate moisture and oxygen levels is essential for the health of the beneficial microbes that make worm castings special. Worm castings sold by big box stores may be shipped across the country and stored in warehouses where conditions aren't monitored. #buylocal #wormcastings #vermicast