Description
We can never have enough Penstemons, if only able to grow them all. The Royal Penstemon, has large flowers in various colors from deep blue, lavender to purple with white throats.
Images: Penstemon speciosus
A drought resistant species for a dry, well drained, rocky locations – ie. the rockery. Marginally hardy maybe in our region but worth giving it a try.
Germination: at least 2 months of cold/moist stratification required.
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