When you apply it to the soil, it acts as a natural repellent. Unlike many types of repellent, you will use castor oil not on plants but in soil, since it aims to keep moles from entering your garden at all. Baar Lawn Mole Castor Oil – difficult to apply. Getting rid of these little digging machines can be daunting, and pest-control services can make a bigger mess in your garden than the moles. Tomcat Mole and Gopher Repellent utilizes a proprietary formulation that significantly improves the ability of castor oil, the active ingredient, to mix with water and penetrate deep into the soil where moles … Using castor oil as pest control is a time honored method and is non-toxic and safe around children and pets. The manufacturer says it’s good for 20,000 sq ft. Commercial Repellents and Recipes. However, you can deter moles by using a homemade mole repellent made from castor oil by using these steps. Nature's Mace Mole Repellent 100% Castor Oil-32oz Concentrate : $19.97: Buy on Amazon: 9: Vekibee Pack of 6 Sonic Mole Repellent Solar Gopher Repellent Ultrasonic Vole Chaser Mole … Castor Oil Granules repel moles for 30 to 75 days and castor oil-based repellent was effective in 26 out of 27 tests. Castor oil has been used as a natural insect repellent as far back as Greek antiquity. If it get on their skin, it will make them itch. Click here to learn more. To take advantage of castor oil's natural insect-repelling properties, mix it with another essential oil. 100% satisfaction guaranteed. Baar Lawn Mole Castor Oil is a liquid solution of castor oil that is specifically produced to repel moles. Moles can badly damage your garden in just a few hours. Unfortunately, this product cannot be applied just as easily as the granules described above. Step 1 – Mixing the Repellent Castor oil for garden use may repel voles, moles and possibly other digging and tunneling animals, such as armadillos. To use 100 percent castor oil as a mole repellent, you must mix three parts castor oil with one part dish soap. Here’s why natural mole repellent with Dawn and castor oil works: Moles hate castor oil. You will need 4 tablespoons of this mixture to add to 1 gallon of water. The castor oil doesn’t kill the moles but it will upset their digestive tract and cause stomach upset.