Penstemon Raven puts on a great show of rich dark purple flowers in the Spring and then repeats with fewer flowers in Summer and Fall. The plants fade after two to three years but they do a tremendous job of quickly filling in a young garden or a newly opened space. I trim off the dead flowers and cut Penstemon Raven back heavily in the late winter and then less severely after each blooming cycle. If the plants canair-layer on their own they extend their lifespan significantly. The Penstemon gloxinoides group will take temperatures down to 10° F. I have sometimes had trouble with mites and have cut off the affected portions to fairly good success.
High resolution photos of Penstemon Raven are part of our garden image collection.