So, will summer pruning kill your tree? Only if you’re being an idiot about it. (Sorry, Gary, but it’s true.) The risk is real but manageable—stick to removing dead wood, avoid oaks and birches in hot months, and never take more than a quarter of the branches. Your tree will forgive you.
If you absolutely must prune for size or structure, wait until late winter or early spring when the tree is asleep. It’s like waking a bear during hibernation versus giving it a flu shot while it’s running. One is rude; the other is just bad timing.
And if you’re still unsure? Hire an arborist. They’re the tree therapists who know when to say “no” to a summer haircut. Your tree will thank you with shade, beauty, and maybe a squirrel or two that won’t have to find a new home. Trust me—that’s a win for everyone.