About Frio Bat Cave Guano Company

Frio Bat Cave Guano Company is a family-owned business based in La Coste, Texas, dedicated to harvesting and selling premium Mexican Free-Tail bat guano as an all-natural fertilizer and soil conditioner. Our guano is 100% pure and sifted, harvested directly from the Frio Bat Cave — home to over 20 million Mexican Free-Tail bats — one of the largest bat colonies in North America.

Our product is designed for home gardeners, organic farmers, cannabis cultivators, and anyone seeking a fast-acting, nutrient-rich fertilizer with a guaranteed analysis of 7-3-1 (N-P-K). Bat guano is one of nature's most potent organic fertilizers, prized for its high nitrogen content, beneficial soil microbes, and ability to improve soil structure and water retention without synthetic chemicals.

As the owners and stewards of the Frio Bat Cave, we harvest guano with the utmost respect for the bats and the cave's delicate ecology. Sustainability is at the core of everything we do — we never over-harvest, and our practices ensure the colony thrives year after year. Beyond fertilizer, we offer guided cave tours during the bats' winter migration, legal filming opportunities for production crews, and year-round access for researchers and scientists studying bat behavior, guano ecology, and cave ecosystems.

Every bag we sell is a product of decades of hands-on experience, deep respect for nature, and a commitment to bringing growers the finest natural fertilizer available anywhere.