My front flower-bed is separated from my lawn by a row of edging stones about four inches tall half-buried in the soil. Unfortunately, between being hit by the lawn-mower a few times (oops!), being in a climate prone to frost-heaving and probably some settling action, much of the edge has fallen over into the lawn.
I'm looking to re-set the border, but I feel like if I just dig a new trench and re-bury the stones I'm likely to end up right back here in another year or three, even if I do stop bumping them with the lawnmower so much. Is there anything to be done to reduce the amount of frost-heave/settling problems so that I can fix this once and be done with it?