Three all-natural products – castor oil, soap and corncobs – create granules that are used to rid a yard of moles and gophers. Combined with water, the granules give of a noxious odor that contaminates food supplies and tunnels. The granules are safe for plants and pets.
The most effective way to use a granular product is a graduated approach that "herds" the rodents away from your property gradually over a period of three or four days, starting with the area farthest from the property line. Homeowners can reduce the chances of rodent infestation by planting halcyon, caper spurge or castor beans. These plants emit a pungent smell, and the root systems make it difficult for rodents to dig.