For deer, hosta plants are like candy. Some hostas are marketed as containing a degree of deer resistance, but as with all deer resistant plants, when these critters are hungry enough, they'll eat anything. ... When a deer devours a hosta, it tears the leaves from stems and lets the stems remain.

How do I keep deer from eating my hostas?

Repelling Scents

Garlic, eggs and urine of predators offer strong fragrances that deter deer and other animals from making a meal of your hostas and other garden plants. Just remember, you need to periodically reapply fragrance deterrents so they continue to work.

Will hostas regrow if eaten by deer?

As long as the deer left some stems, it's still early enough in the season that you'll probably see some leaves emerge in a few weeks. When they come back, they may not be as large as your originals were, but they will re-emerge next year as big as ever.