Rent Shop Volunteer Join

Q. Who is Mr. Smarty Plants?

A: There are those who suspect Wildflower Center volunteers are the culpable and capable culprits. Yet, others think staff members play some, albeit small, role. You can torture us with your plant questions, but we will never reveal the Green Guru's secret identity.

Help us grow by giving to the Plant Database Fund or by becoming a member

Did you know you can access the Native Plant Information Network with your web-enabled smartphone?

Share

Ask Mr. Smarty Plants

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
See a list of all Smarty Plants questions

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

Need help with plant identification, visit the plant identification page.

 
rate this answer
Not Yet Rated

Wednesday - March 12, 2008

From: Queen Creek, AZ
Region: Southwest
Topic: Propagation
Title: Germination period for Snow Mountain beardtongue (Penstemon purpusii)
Answered by: Nan Hampton

QUESTION:

Why is the germination period for the Snowmountain Beardtongue so long?. I understand it to be approximately 690 days.

ANSWER:

I did find a record on The Seed Site from UK that reported "679" under the column heading "Winter-Out" for Penstemon purpusii (Snow Mountain beardtongue). According to their Germination Page: "Out = seeds sown in pots of compost and kept in uncovered trays outside in the open or on a shelf unit with covered sides."

Tom Clothier's Garden Walk and Talk web page has a Penstemon Germination Database that gives the germination time for P. purpusii as 8 weeks at 40° F. Perhaps the The Seed Site number was an entry error (maybe it was meant to be 67 or 79) or perhaps the outdoor temperature in the UK was not sufficiently consistent during the winter to germinate the seeds in the same amount of time as reported in the Penstemon Germination Database.

 

More Propagation Questions

Propagation of century plants from "pups"
August 10, 2007 - I have two small century plants...about 10 inches tall...they are "pups" from an older one. one of them has three or four very small roots and the other looks like it was pulled up out of the ground...
view the full question and answer

Possibility of growing Buckleys yucca in South Carolina
February 03, 2008 - I live in Lexington, SC. I am wondering if I can grow Buckley's yucca (yucca constricta) here and if so, where can I purchase the seeds or plants? I am from Texas and we are trying to create a "we...
view the full question and answer

Transplanting an immature Sweet Bay Magnolia
May 30, 2006 - Hi Mr. Smarty Pants: I just found what I think is a Magnolia Sweet Bay growing wild next to an oak and a pine tree in my back wooded yard. It has blooms on it and is about 2 feet tall. There are tw...
view the full question and answer

Germination of bluebonnets from seed
December 16, 2007 - I am having problems getting my bluebonnet (Alamo Fire and regular bluebonnets to germinate from seed). Usually I soak them in lukewarm water overnight then plant in a potting mix. I am only getting...
view the full question and answer

Division of impatiens grown in a pot
December 08, 2007 - I have an impatient and it is growing out of the pot. I was wondering if it were possible to divide it somehow and have two medium size plants.
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.