Advice for perennials in small gap or hard soil
I have about a 3" gap running between a concrete pool deck and a wooden wall. The soil is hard and of unknown quality. I would like to plant a low maintenance perennial along this gap. Something that flowers through summer would be great and does not grow higher that 6 or 9 inches. Or something that would climb the wall although not aggressively. The area gets plenty of sun. Any advice?