Do deer eat magnolia trees? It is an essential question for homeowners, gardeners, and nature enthusiasts to consider. Deer can cause significant damage to plants and trees, and magnolia trees are no exception. Deer are known to browse on magnolia trees, especially during the winter months when other food sources are scarce. They will eat the leaves, buds, and even the bark of young trees. This can cause serious damage to the tree, and in some cases, it can even kill the tree.