Rob's plants
home garden plants wildlife seed photos
plant sale journal topics plantlinks fun guestbook

Penstemon serrulatus

Penstemon serrulatus

Common name Cascade penstemon
Family plantaginaceae
Life cycle perennial
Flowers purple (summer)
Size 18-24"
Light sun-part shade
Cultural notes ordinary garden soil (not too dry)

Shrubby perennial, native to the Pacific Northwestern United States. Despite several successful attempts to grow it from seed, I have yet to get plants through the subsequent summer and winter to observe a second-year plant. So I finally decided to at least take a snapshot of a first-year seedling to have something to show on this page. The leaves are finely serrated (as the species name would suggest), and have purple undersides. I'm hopeful that my luck will turn this year, so that I can see some flowers next year.

This plant used to grow in our garden, but it slipped away...

Read about all the penstemon species in our garden

About my plant portraits
PlantLinks to other web pages about Penstemon serrulatus

Seed-starting details for this plant

  1. Seed from '05 trade. Pot outside Jan 30, with grit covering seed. ~65%G by May
  2. Same seed as above. Baggy 35F (12w; 7%G, 12w) - 70F (47%G, 1-6d)
  3. Same seed as above. Baggy 35F (12w; 45%G, 9-12w) - 70F (25%G, 3-6d)
  4. Seed from '10 trade. Baggy 35F (57%G, 8-12w)
  5. Same seed as above. Baggy 35F (60%G, 6-11w)

Clothier lists this as germinating at cold conditions with light requirement. My trials suggest that cold conditioning is helpful, but that for some seed batches more germination occurs when temperatures increase; light, while perhaps helpful, does not appear to be necessary.

I welcome comments about my web pages; feel free to use the form below to leave feedback about this particular page. For the benefit of other visitors to these pages, I will list any relevant comments you leave, and if appropriate, I will update my page to correct mis-information. Faced with an ever-increasing onslaught of spam, I'm forced to discard any comments including html markups. Please submit your comment as plain text. If you have a comment about the website as a whole, please leave it in my guestbook. If you have a question that needs a personal response, please e-mail me.

Your name

Your comments

home garden plants wildlife seed plant sale topics guestbook journal plantlinks

Last modified: May 06, 2012
Contact me