The perfect perennial for sustaining interest as your garden quietens down for autumn, this Penstemon 'Polaris' sports showy, trumpet-shaped flowers in a wonderful magenta shade. With exception to particularly severe winters, Penstemon plants are easy to grow, so will make a good choice for the beginner gardener. To prevent them from becoming leggy, we advise that you prune them attentively, and to also deadhead spent blooms.
