(Beard Tongue) A compact habit Penstemon series with vibrant blooms. Penstemon Rock Candy® Purple features lavender-blue tubular blooms on a compact flower spike. The compact, upright mounding habit stands 12 inches tall by 12 inches wide blooming early summer through fall with a light trim as needed. Hardy in zones 5-8, Penstemon Rock Candy® Purple likes to be grown in full-sun areas with well-drained soil. The bell-shaped blooms are inviting to butterflies, bees, and hummingbirds. This heat and drought-tolerant perennial is the perfect size for borders, walkways, and container gardens. Collect all the colors in the Rock Candy® series for a colorful garden.