The worst threat to young trees and shrubs in winter isn’t cold or snow. “It’s bunnies and Bambi,” said Sharon Yiesla, plant knowledge specialist in the Plant Clinic at The Morton Arboretum in Lisle.

The favorite evergreen for deer to snack on has seen some damage during this authentic Michigan winter. Is there anything that can be done to make the evergreens fill back out? Don’t feel bad if, once ...