Experts and BHG readers answer.
How to protect Hostas from deer attack?
Thanks for writing. I'm afraid the only sure way to keep deer out of your yard is to put up an 8-foot-tall fence.
Some gardeners have found success with repellent sprays such as Deer-Stopper, Deer-Off, Deer-Away, Plantskydd, --- but not every spray works for every gardener, so it may take some trial and error.
Otherwise, you can plant varieties they typically don't eat. Check out a list of deer-resistant plants for your area: