Q.protecting my coral bells in the winter
how do I protect my coral bell in the winter months. my flower bed has decorative rocks, so Do I have to push aside my decorative rocks from around the plant and add mulch or compost around the coral bells.

Certified GKH Gardening Expert
Unfortunately, I need more information, such as your climate zone, age of the plants, etc. to give you the best advice on this. With the details provided I can only tell you what the plant can tolerate. It will be up to you to decide if your conditions fall within these acceptable ranges.
Here is an article on the care of the plant: https://www.gardeningknowhow.com/ornamental/flowers/coral-bells/coral-bells-plant.htm