RHS Perfect for Pollinators Attracts Wildlife: This variety is perfect for attracting bees & other pollinating insects to your garden this Summer. Penstemon Red Bells truly is one of the best & most prolifically flowering of the Summer blooming Perennials. It will produce stunning flower spikes in a scarlet-red shade with a contrasting white throat throughout Summer & even into the Autumn. Thriving best in a sunny location, this classic cottage garden plant is perfect for well-drained borders & patio containers.