En EspaŅol

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?


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
Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.
Need help with plant identification, visit the plant identification page.
rate this answer
Not Yet Rated

Monday - June 25, 2007

From: South Paris, ME
Region: Northeast
Topic: Propagation
Title: Crossbreedding of Lupinus polyphyllus and L. perennis
Answered by: Nan Hampton


Hello, can Lupinus polyphyllus and L. perennis crossbreed? I have both and want to keep perennis genetically pure, is the only way to do this is to get rid of the polyphyllus?


Lupinus polyphyllus (bigleaf lupine) would be very likely to crossbreed with Lupinus perennis (sundial lupine) since it has been used in England since the late 18th century to produce hybrids by crossing it with many other species of Lupinus. Unless you are interested in experimenting with making hybrids, your best bet is to remove the P. polyphyllus.


Lupinus polyphyllus

Lupinus perennis




More Propagation Questions

Rooting hybrid Savannah Holly from cuttings from Gainesville FL
March 04, 2011 - I need instructions on rooting the Savannah Holly from cuttings. I understand that seedlings will not be true to the parent..is this true? Please help. What type of soil mix should I use?
view the full question and answer

Keeping a Texas Madrone alive from Belton TX
October 01, 2012 - I have found a supplier of a Texas Madrone and have been wanting to grow one ever since our family vacation to Big Bend NP. My question is how do you have success with this tree? Many people say it is...
view the full question and answer

Grafting Pecan Trees
July 05, 2013 - I have planted two pecan nuts and now they are about 4 feet tall trees, they have not been grafted but can I graft one of the trees to the other and vice versa and expect pecans from then, they are he...
view the full question and answer

Will horseherb (Calyptocarpus vialis) survive planting in July
July 14, 2008 - I live in Southwest Austin and I am planting horseherb groundcover in my back yard that is part-shade. Can I plant this right now (July) or is it too hot to plant?
view the full question and answer

Mexican Sycamore trees grown from seed
November 15, 2011 - If someone is selling an alleged Mexican Sycamore grown from a seed harvested from a mature tree growing in Austin, is it likely to be a TRUE Mexican Sycamore -- or has it most likely been pollinated ...
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.
© 2015 Lady Bird Johnson Wildflower Center