When voles ate bulbs intended for a study on deer-resistance, Cornell University’s Bill Miller made the best of it. In the fall, Miller had potted up the bulbs and put them into cold storage. Unfortunately in spring he discovered that “during the winter, prairie voles had taken up residence in the stacks of crates and had eaten more than 35% of the bulbs. We found two large nests of voles, and the youngsters were quite happy, well fed, and growing fast from their nutritious meals. . . . Of course we were not happy with this, but we used it as an opportunity to learn some things about vole feeding and flower bulbs.” The voles’ favorite bulbs included tulips, crocus, Anemone blanda, and Chionodoxa luciliae, but they avoided those listed below. Deer would, too, Miller points out, since deer and voles are known to have similar tastes.
Hyacinths – “Bulbs were not attacked and shoots were perfect when uncovered. . . . From this we can conclude that hyacinths are pretty immune to attack from voles, and my own experience suggests that deer usually leave hyacinths alone.”
Daffodils – “Voles dug in about 10% of the pots but did not damage the bulb or emerging shoots” – and most gardeners know that daffodils are reliably deer-resistant.
Other bulbs that “experienced little or no damage” included snowdrops, snowflakes, cyclamen, trout lilies, and crown imperial. Others that were “injured but not destroyed” included alliums such as Allium sphaerocephalum (10% damage), winter aconite, and Siberian squill.