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Dutch elm disease can’t harm humans. In fact, according to Cal Fire, bark beetles aren’t even typically dangerous to trees unless that tree is already weakened. The problem comes when Dutch elm disease kills a tree. That tree is more at risk of falling and catching fire, which can pose a serious threat.

Trees that flower in the spring—like dogwood, cherry, magnolia, and pear—should not be pruned during the winter. These spring-flowering plants grow buds on old growth, so you’ll actually remove what would’ve been gorgeous flowering foliage. Instead, wait to prune until right after they bloom, when the flowers fade.

Any tree that needs to be pruned should be pruned to remove dead branches at least once a year. You may need to prune far more often if you’re trying to maintain a certain shape or to save a tree that suddenly becomes infected.

A tree can grow back from its stump, but full regrowth is unlikely (especially for more stubborn conifer trees). Instead, trees are more likely to send up a number of shoots from the dead stump, which will try to develop into primary stems over time. In other words, it will start to look increasingly bushy. The goal of killing and drying out a tree stump is to prevent that from happening, as well as make the stump easier to completely remove.