I've come to realize that how we get spring bloom is by not primarily relying on spring bulbs, some of the prettiest of which are vole feed. Below a mid-May (when many spring bulbs are in bloom here). None of these perennials seem to show any mole effect, at least in our growing conditions.
There is one hellebore (Lenten rose) in the picture. We have a number of them. Hellebores are poisonous to voles as well as ourselves. I read recently that voles do not tunnel through hellebore root systems.
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