Do any of your soils contain herbicides or pesticides? February 23, 2021 17:37 Updated None of our products contain any herbicides or pesticides. Related articles Will the wood in the soil cause a "nitrogen draft"? Is your bat guano sterilized? Where do you source your bat guano? I have this old plant in a pot for years, why is the soil shrinking and what should I do? Should there be any bugs in the soil?