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?

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
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
3 ratings

Sunday - February 15, 2009

From: TARRYTOWN, NY
Region: Northeast
Topic: Wildflowers
Title: Growing Lupinus perennis in sandy soil.
Answered by: Jimmy Mills

QUESTION:

I want to grow Lupinus perennis for the Karner butterfly. I know it won't grow in clay (my soil is wet clay). Can I plant the plant in a big (20" diameter x 17" tall) rubber pot, and fill the pot with sandbox sand. (Or some other kind of sand?) If so, how many can I put in that size container? thanks.

ANSWER:

Lupinus perennis (sundial lupine) is a beautiful plant that prefers to grow in well drained, sandy soil. However, "sandbox sand" is not what you want to use; the particle size is too small and it becomes compacted. You want something coarser that is commonly called "builder's sand", and you also need to add organic matter such as peat moss or leaf mold to provide nutrients and help hold moisture. Make sure that the pots you use allow for drainage.

The USDA Forest Service link has a lot of information about the Sundial Lupine and its growth requirements (be sure to scroll through the whole page), and the UMass Extension link tells about good soil mixtures to use.

The USDA link suggests that the Lupine seeds can be planted 5 per square foot. Since the area of your container is a little over two square feet, you should plant to have 10 or 12 about evenly spaced lupines in your pot.  You will probably want to sow more seeds than that, since some will probably not germinate the first year. 


Lupinus perennis
 

More Wildflowers Questions

Proliferation of Small Palafoxia in Dallas Co. TX
June 07, 2013 - A few years ago I noticed a new wildflower I hadn't seen before in the southwest Dallas County area. I found the name to be Small Palafoxia. It was growing along the edges of HWy 67 in Duncanville ...
view the full question and answer

Native wildflowers for Tennessee
December 24, 2010 - Can you suggest some native wildflowers for west Tennessee and a source for seeds?
view the full question and answer

Evergreen privacy hedge and drought-resistant garden
July 21, 2008 - I am looking for a hardy evergreen hedge for privacy in Northern Michigan. I have sandy soil. Also am interested in planting a drought garden with mostly sun in same sandy soil.
view the full question and answer

More on bluebonnets
June 22, 2004 - When do the bluebonnets bloom in the Austin - San Antonio, Texas area?
view the full question and answer

More on bluebonnets
April 01, 2003 - Is there such a thing as a red bluebonnet?
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP | STAFF
© 2016 Lady Bird Johnson Wildflower Center