Instead of replanting, can the hibiscus be cut back and left in the ground for winter?
Can Hibiscus Be Cut Back and Left in the Ground for Winter
Certified GKH Gardening Expert
Depending on your climate, hardy hibiscus can be left in the ground throughout winter. In cooler climates additional protection may be needed, such as tarps, burlap, etc. A light trim is ok but I would wait until spring before performing any worthwhile pruning. Here is an article that you may find helpful: https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/tips-for-pruning-hibiscus-plants-when-to-prune-hibiscus.htm