Foxglove beardtongue, Penstemon digitalis
 
Foxglove beardtongue is one of the most spectacular early-season bloomers, flowering from late spring to early summer. This airy plant has showy white tubular flowers marked with violet pollen guidelines and always looks tidy making it a great boulevard plant. . The plant grows 0.90-1.50 m tall, with glossy green, evergreen foliage, and is best planted in groups of 5 or more for an orderly, beautiful look. 
 
Ecology:
Foxglove beardtongue blooms at a critical time when spring flowers have faded, and summer flowers are not blooming yet. As a prolific nectar producer, foxglove beardtongue attracts a vast diversity of pollinators. It is highly attractive to long-tongued bees (bumble bees, digger bees, leaf cutter bees), short-tongued bees, butterflies, moths, and hummingbirds. Hairs on the stamen force bees deeper into the flower for effective pollination. Host plant to Baltimore Checkerspot and Common Buckeye butterflies. Provides critical late spring/early summer resources for newly hatched bumble bees.
 
Growing conditions:
Foxglove beardtongue prefers full sun but tolerates light shade and thrives in well-drained soil, including loam, clay, and sandy soils. It is drought-tolerant once established, but intolerant of wet or poorly drained soil. It makes a great boulevard plant because it is deer-resistant and salt-tolerant, easy to grow, and low-maintenance.