We have a strip of (sloping) dirt next to our driveway, sloping from the fence down towards the driveway. We have 4 rose bushes planted this year about the middle point of the strip - lower then the dirt at the fence, somewhat higher then the dirt at the driveway. I hope that all makes sense.
We are tired of dirt continually washing onto the driveway so we are going to build a small retaining wall -- approx. 10 inches above the driveway. My concern is our new roses. Once the retaining wall is in place, we would be filling it such that it is even with soil the entire length - like a raised bed.
Can we raise the soil around the roses with out doing them harm? If so, is there a theoretical maximum height?
If it matters, these are the roses.
as an aside, that strip of dirt used to be the home of 4 large sweet gum trees. 2 of the bushes straddles one remaining trunk and there is a lot of tree roots left there. Also, we have new concrete.