Penstemon Red Rocks
Penstemon Red Rocks puts on a great show of pinkish red flowers. Compared to the Penstemon gloxinoides group, I have had less pest issue. The plants tend to flop more but produce more flowers. Penstemon Red Rocks is drought tolerant but will flower best with a moderate amount of water. The plants are at their best for 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 Red Rocks back heavily in the late winter. If the plants air-layer on their own they can extend their lifespan significantly.
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