Vermi-liquid is the skin secretion of worms. It is often called worm-tea. Do not confuse it with compost tea made from worm manure, which does not work on orchids. Vermi-liquid comes from a different gland of the worm similar to the difference in a cow making manure or milk from different organs. It contains millions of beneficial microbes necessary for healthy plants that no longer live in dry compost. It enables plants to process fertilizers.