Bat Guano approx. Bat Guano makes an excellent fertilizer and soil conditioner. It’s fast-acting, has little odor, and can be worked into the soil prior to planting or during active growth. The Guano is harvested in the USA with the up-most care to ensure that no harm is done by protecting the cave's ecology and only harvesting when the bats have migrated South for the winter.
eBay