Don't give up. When I first moved into my new house I did the same thing with these plants because they said deer resistant. They ate them down. After I started planting more plants they did not not like and I made some deer scram. (Garlic, hot pepper sauce,. As you garden and you wipe perspiration with a handkerchief lay it in the garden) they cannot stand the smell of humans.
They started leaving them alone. They walk and smell and graze they smell your perspiration and they will keep walking.
Deer have to be trained. If they stop getting use to not going in that area they do not seem to go back at least for awhile. Nothing is deer proof if they are hungry they will eat anything.
They love roses after making it an area that they did not like I even have roses in that garden they just go to another area of the yard to eat something else. I have 3 acres and am constantly fighting saving my plants in one area or another from the critters.
