One of my favorite penstemons. Much larger flowers than most, on an upright plant with fresh green foliage.
||3' tall, 18" wide
||ordinary garden soil
||Needs 6 weeks cold treatment, then germinates at room temperature. Seedlings are finnicky, very susceptible to damp-off. Some years it self-seeds.
detailed seed-starting info below
|Seed ripens||late September|
We left this plant behind in our Pennsylvania garden (and wish it well); we don't grow it in Houston.
Read about all the penstemon species in our garden
One or more images of this plant are included in my stock photo catalog
About my plant portraits
PlantLinks to other web pages about Penstemon cobaea
- Seed from NARGS '17/'18 exchange. Baggy 70F with light (82%G, 5-8d). Also baggy 35F (4w) - 70F with light (27%G, 5-10d)
- Same seed as above. Baggy 70F with light (~20%G, 11-15d)
- Same seed as above. Baggy 70F with light (no G, 17d)
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February 05, 2020