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

Tuesday - March 19, 2013

From: McKinney, TX
Region: Southwest
Topic: Herbs/Forbs
Title: Will several Penstemon species hybridize?
Answered by: Joe Marcus

QUESTION:

I have Penstemon cobaea, Penstemon triflorus, Penstemon cardinalis, and Penstemon murrayanus in my landscape. Will they hybridize with each other?

ANSWER:

Penstemons are famous for hybridizing.  There is no guarantee that any two species growing in close proximity to one another will produce hybrid offspring, but there is an excellent chance they will.  Penstemon cobaea and P. triflorus regularly cross in our gardens and they very likely also cross with P. murrayanus, though we're not sure about that.   We have not yet grown Penstemon murrayanus, but we think that it's very likely that it would also hybridize with other nearby species.

 

More Herbs/Forbs Questions

Replacing St. Augustine with Horse herb in Austin, TX.
December 12, 2012 - I'm considering replacing my St. Augustine grass with a Horseherb/Straggler Daisy ground cover, but I've heard that it provides a mosquito breeding habitat, especially if you allow dead leaves to de...
view the full question and answer

Grass for Seattle Arboretum
May 20, 2012 - I am writing to you on behalf of the Arboretum at South Seattle Community College Arboretum. I am interested in Panicum virgatum Switch Grass as a plant for a very heavy clay garden in our Arboretum a...
view the full question and answer

Shade tolerant Wildflowers for Oklahoma City
April 16, 2012 - I live in Oklahoma City. I'm not in town very often, and am seeking low maintenance plants. I have MANY trees in my backyard, which makes it quite shady. I have raised beds amongst my rock garden ...
view the full question and answer

Pond Plants for Eureka Springs AR
May 16, 2012 - I have a 1 acre pond that we are cleaning up. This area will be used for recreation and fishing. We plan to put native rock around some of the edges and need perennial plants that do well in rocky are...
view the full question and answer

Trimming of Pineapple Sage and Salvia Greggii
October 07, 2007 - I live in Central Austin. My question is: When is the best time to trim back Pineapple Sage and Salvia Gregii? How far back should these plants be trimmed?
view the full question and answer

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