A thick layer of mulch around perennials can help them survive winter by insulating the roots against cold temperatures

https://medium.com/@percanpobe/creating-visual-interest-with-layers-of-stone-and-organic-materials-0bb8eae6d604?source=your_stories_page--------------------------------------------

A thick layer of mulch around perennials can help them survive winter by insulating the roots against cold temperatures and harsh weather conditions.