Answer: There are only a few things you need to do to ensure your perennials survive the winter and come back strong next spring. First, don't feed your plants now. Wait until early spring. Second, wait until the first frost kills back the tops of the plants and then cut or pull the dead foliage and remove it from the garden. Then spread several inches of mulch over the bed to help keep the soil from heaving during the freeze and thaw cycle of winter weather. In the spring, brush or rake the mulch away from the crowns of the plants. You can fertilize after new growth begins. The plants you list won't be interesting to deer during the winter months because the tops will be gone.
Best wishes with your garden!
Q&A Library Searching Tips