How do I win rid of mice chewing my rose bush stems?
Answers: Well you can try to protect the plants or try to get rid of the mice. I've seen individuals wrap their trees and bushes with plastic and even foil to keep deer, rabbits, and mice away. Another solution would to be setting traps around your plants to rid yourself of the mice.
I would tag on 1/4" screening about 12" tall and set into the soil 4" (if the rose roots do not own to be cut for this - otherwise as deep as practical) - make a tube of it around the cane - maybe 18" diameter or whatever works near your canes. I have voles and they do get through the stems when we have really dry periods, so wet the garden a little more (they stripped my new little Ephorbia and kill it) and/or set some mouse traps with peanut butter near their entry holes. You can also put Castor Oil Bean seed down their holes and that reduces their population - or get a few black rat snakes and release those contained by the yard, because by the time the mice or voles know what has moved into the neighborhood? They will be substantially reduced within numbers - 100% organic! LOL
And black rat snakes are non venomous but do eat other poisonous snakes as all right as mice and voles and are very shy about those - so they will hide when you approach. We had two within the garden and the mice and voles were no problem that year! We would see maybe 4" of retreating tail when we come out in the yard within a hurry - normally no sign of them at all - and I lately had to stomp a few times before matrimony in the fern bed, because they did like to swing out there before we put the pond contained by. Voles are bad again this year, maybe we call for to put some more ferns in. Moth balls. Works for me.