Growing Penstemon from seed
- To: propagation list <propagation@mallorn.com>
- Subject: Growing Penstemon from seed
- From: S* W* <s*@gj.net>
- Date: Sat, 13 Mar 1999 09:15:54 -0700
Eric:
Deno has a lot of info on penstemons. Here's what I found:
Penstemon alpinus: germ 70(3%)-40(21%)-70(9%) and 40(12% in 3-8w)-70(27%
in 3-4d). A later sample germ. 70D GA-3(68% in 1-3w), 70D(6%) and
40-70D(1/16 in 3-4d).
Penstemon digitalis: requires light to germinate. Germination was best
with seed dry storage 6m at 70 or 40 in 70L(90% ind. t 4d, first order
rates with half life of 1.0%/d) or 40-70L(95-100% largely in 2-3d) and
less with fresh seed in 70L(26% in 7-24d), 70D GA3 (42% in 2-4w), or
70D-40-70L(7%). None germ in any dark treatment other than GA3.
Penstemon hirsutus var pygmaeus: require light. Fresh seed or seed DS 6m
at 70 germ. 70L(65% in 1-11w), 40-70L(56% in 4-8d) and none in 70D or
40-70D.
P. hirsutus requires light for germination, and germination is promoted
by a preliminary 3m at 40. Seeds germ. 40-70L(71% in 4-8d), 70L(6% in
1-6w), 70D(none), and 40-70D(none using fresh seed or seed DS 6m at 70.
Penstemon ovatus: germ immediately at 70.
P. palmeri germ in april from seed sown outdoors in February
All are quotes from Deno second edition.
Hope this helps,
Sheryl in Western CO
Date: Thu, 11 Mar 1999 13:22:12 -0800
From: Eric Bina <ebina@netscape.com>
Subject: 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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