Roses for dense adobe clay soil?
I'm in the SF East Bay and we have fairly typical dense adobe clay all around the yard. Most of the places I have plantings have been amended over the years or built up and blended with other topsoils. I also use a lot or moss rock walls to build up planting beds and bring in outside soil.
But... I have a new area I'm thinking might make a pretty sitting area with a bench. I would love to add roses to this area, but the ground is densely packed clay and not a place (because of a walkway) where I can build up a moss rock wall for planting.
Amending just the rose planting hole would create a bathtub effect and probably drown out the rose. I suppose I could dig and amend a wider area, but with clay soil that dense it is likely the texture would eventually return to mostly clay as the compost breaks down.
So... I was wondering if there are OGRs that can tolerate (or that are actually happier) in this kind of soil? I can always put a small rose in a large container and get a pretty effect for a few years, but I'm wondering if there are roses that could go right in the ground there.