In Unique Too wrote:
Susan, I plant them at ground level then build a 2-3" earthen dam
about 18" across. Gives me something to keep the water near the roots
until they get started. I put mulch over the entire area and the dam
is invisible. Don't know how much, if any, it helps, but it makes me
feel better.

Me too. Without a small 'crater' the run-off makes watering impossible
on my soil. Just be wary that you don't overdo it, as a crater can be
the death of a rose in poorly drained soil. I speak from experience :-(