First off, I don't know much about roses at all. I'm planting an entirely edible landscape in a Tudor style, and after reading that all Rosa species flower petals are edible, I decided I had to have one! It's a little trickier than that though... the whole landscape is also evergreen, or at least semi-evergreen. I haven't found any definitive answer as to whether or not there are any roses that would be at least semi-evergreen in MD zone 7. I'd prefer a rose that's thornless, or nearly thornless. And of course, since it's for an edible garden, a fragrant flower would be a huge plus (most edible flowers taste like they smell). The growth habit doesn't matter too much, though something substantial would be preferred.
