A bit of information or two missing here - are you growing in pots and moving things in and out every season? I don't get the in the ground over the winter then moving into a greenhouse in the spring routine. Is this a business? Which of your plants have suffered damage? What in particular are you trying to save?

Critter damage notwithstanding, I'd be afraid of more loss in a chest freezer. It might be easier to bait the mice in the fall (even over the course of the summer); D-Con pellets work remarkably well and a box or two is generally sufficient to wipe out a nest. A box of D-Con from one of the big box stores is arguably cheaper than one perennial replacement from a garden center.

Yes they are potted perennials that I don't sell. I've been using straw as a cover for winter storage then in the spring I bring them out for spring sales. The bait thing only works as long as the bait doesn't go moldy. I'm still getting some damage. Has any one used any other sort of tricks to either keep them away or to eradicate them? I thought the old freezer idea might be a way of keeping the mice out, period. What about those electronic devices? Any thoughts? Thanks Gianty.

Straw doesn't seem like a great idea if the problem is mice. When I need to overwinter potted plants, I sit the pots on the ground close together and fill in the spaces between with bagged topsoil or fill dirt. Nothing on top of the pots (except maybe some spilled soil).