Compost Tea How-To 1. Shovel some compost onto the middle of a two-by-two-foot square of burlap, and tie the corners together with twine. 2. Soak in a plastic or galvanized-steel bucket for a couple of days until the water turns a rich, brown color. Remove the burlap sachet, and empty its contents back onto the compost pile. 3. Use the nutrient-rich brown ''tea'' to water your herbs.