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.
Drought-tolerant once established, penstemons are easy care perennials suitable for most conditions. Plant in full sun in an enriched, free-draining soil. Water regularly during establishment and extended dry periods for improved flowering and performance. Prune back to a low mound after flowering to maintain a compact habit.