Can I Grind Up Castor Plants To Make My Own Mole Repellent?

Question

I grew a bunch of castor plants, but frost took them last week. I have a serious mole problem in my daylily patch, can I grind the castor plants up leaves and all and mix w water in a 5 gal bucket and pour it over the daylily bed to help keep the mole out. 1. we have a stray come off and on, will this hurt him? 2. will it poison worms/bugs so that it will kill birds that eat them? and 3 we do have a well on the property about 350 ft deep, our drinking water. I went to the store to buy mole repellent product, (granules) but seen the active ingredient was castor oil, so wondered if I could make my own since I already have the plants. To clarify I don’t want to poison the kitty, the birds or myself. 🙂

Answer 1

To be on the safe side, I would not make my own. You wouldn't know how much was too much, and castor bean plants are so toxic. Plus, the toxins do not transmit into the oil, so the repellent using castor oil is safer.
Here is more:

https://www.gardeningknowhow.com/plant-problems/pests/animals/mole-control.htm

https://www.gardeningknowhow.com/ornamental/foliage/castor-bean/castor-bean-information.htm