|This short-lived perennial, often treated as an annual in colder climates, is grown primarily for it's pretty, tubular, two-lipped flowers (all colors but blue and yellow). The leaves are narrow and lance shaped (up to 4 inches long). Penstemons like dry but rich soil. They are summer bloomers, attract hummingbirds, and will keep your garden exciting after the spring colors have faded away. Penstemon spectabilis produces long, narrow panicles of 2-lipped, tubular, lavender flowers with white insides in early summer. Grows 30 to 48 inches tall, 18 to 24 inches wide.