According to Paul James of HGTV, using granules of castor oil is a great way to get rid of gophers. The granules act as a natural repellent and help to control gophers, moles and armadillos. As an additional benefit, castor oil granules can help contribute to the health of a garden.Continue Reading
Castor oil granules should be applied at a rate of 1 pound per 1,000 square feet. A spreader can help make the task less arduous, but it may be difficult to properly calculate the amount of granules that have been dispersed. If dealing with a large property, spread the granules over all lawn and garden beds.
After applying the granules, you can either water them yourself or wait for the rain. Once the granules dissolve, they release a scent that begins to drive the pests away.
When distributing the granules in a large property, focus on forcing the pests to head in a certain direction, preferably an exit point of the property. To direct the gophers, place and water the granules at a point farthest away from the exit. Repeat this process a day or two later, but water and place the granules closer to the exit point. Continue this process until you reach the border of the property.