Join Date: Nov 2001
Location: Southeastern Illinois
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I used castor bean plants and seeds, although I'm not the one that you sent them to. The moles stayed away from the plants and didn't hang out near the holes where I threw in the castor bean seeds. However, they did return later to very nearby locations.
I've had better luck by planting aromatic herbs near the places where I don't want the moles burrowing- things like onions or chives work great and do not invade your entire flower/vegetable beds. For example, you could surround your spring bulbs with some kind of ornamental allium bulbs, usually low height and nice early bloomers.
The moles also stay away from nepeta varietes and other mints, but those are much more invasive. Oregano works well and is only mildly invasive in my climate, zone 4. It doesn't really invade but the clump keeps getting bigger and bigger.
Certain varieties of thyme make nice groundcovers and would probably deter the moles. I don't think the roots go as deep as the other herbs and the scent is not quite as potent.
Castor Bean is actually very aromatic, although in a more noxious way. Maybe that's why the moles avoid it.
If you live in a warm dry climate, I'd bet that rosemary would work well.