Growing Penstemon from seed
I'm looking for any advice on growing Penstemon from seed.
I've heard they need to be cold stratified. I was also
plannign on trying treatment with GA3 instead. Anyone tried this?
Specifically I am trying to grow:
Penstemon ovatus
Penstemon pruinosus
Penstemon palmeri
Penstemon hirsutus
Penstemon hirsutus var pygmaeus
Penstemon heterophyllus
Penstemon alpinus
Penstemon digitalis
Eric Bina
ebina@netscape.com
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