I am going to try what I do with hostas and see if it works. The only ones that heaved were the ones in the raised bed.
I have a stack of red bricks from a project done on the house. I use them to circle around the hosta and I mulch with leaves. I have never had my hostas winter heave since I did that.
We have freezes and always have a winter thaw that kill any plant that have a tendency to heave in our freeze and thaw weather.
