Penstemon X gloxinioides
Penstemon ‘Midnight’ is another exception to the notion that border Penstemons are short lived. Fifteen years ago I planted several penstemons in my garden, and most of them died after a couple of glorious years. ‘Midnight and ‘Thorn are still strong, good-looking plants. ‘Midnight’ grows to 3’ x 3’. The flowers are deep purple, and if deadheaded they are produced from late Spring through Fall. They are very popular with bees and hummingbirds. The leaves and stems are a deep blue-purplish green and to maintain a healthy compact plant, the stems should be cut back hard in the winter. ‘Midnight’ is otherwise an easy plant to grow and while looking better with some water, it takes drought on the coast. Cut back to 6” whenever it seems to need encouragement for another round of blooms.