Ever-reliable and hardy in most conditions, penstemons are invaluable for their long flowering and semi-evergreen foliage in the garden. 'Midnight' has striking, deep velvet-purple trumpet, shaped flowers on self supporting upright stems that glow in the evening light of summer. Its deep green linear leaves and purple flowers provide a striking contrast to grey foliage. Water regularly to promote vigorous flowering.
Dry-tolerant once established, penstemons are easy-care perennials for most conditions, preferring full sun, free-draining position. Water regularly during dry periods for improved flowering and performance. Prune back to a low mound after flowering to maintain a compact habit.