Voles, unfortunately, moved into my garden about 15 years ago. Most of my hostas were devoured before I realized what was going on. My pachysandra was riddled with tunnels, and the voles even went so far as to take out a cherry laurel and a young Japanese maple. A solution that I have had success with is to bring in plants known to be poisonous, such as hellebores (Helleborus spp. and cvs., USDA Hardiness Zones 4–9), monkshood (Aconitum spp. and cvs., Zones 3–8), bleeding heart (Dicentra spp. and cvs., Zones 3–9), lily-of-the-valley (Convallaria majalis spp. and cvs., Zones 2–7), mayapple (Podophyllum spp., Zones 3–9), and daffodils (Narcissus spp. and cvs., Zones 3–9). I plant these in drifts to encircle areas planted with the tasty, more vulnerable plants. Also, when I cut back spent foliage from the toxic plants, I mix the cuttings with old leaves from the woods, chop it all together using my lawn mower, and dig it into new beds or use it as light mulch.
—Mary Bowe, Richboro, Pennsylvania
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