Shrub/plant suggestion please.
I should be grateful if anyone can suggest a suitable perennial plant or shrub for a corner of a raised bed that is bounded on two sides by wall and is south facing. It will get more sun as the sun climbs higher over the surrounding rooftops. Ideally I would like a plant that grows to above shed roof level but does not spread out, is hardy, is attractive to pollinators and has flowers in the purple through to pink spectrum. I had thought of a buddleja but I haven't the room for a bushy, spready plant so I am a bit stumped.