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
Not Yet Rated

Thursday - September 28, 2006

From: Austin , TX
Region: Southwest
Topic: Wildflowers
Title: Excessive nitrogen inhibiting coreopsis blooms
Answered by: Joe Marcus

QUESTION:

I planted coreopsis in the summer last year and they bloomed profusely nonstop from June 2005 to April 2006. However, this past summer, continuing to present time, my coreopsis have not bloomed at all nor do they show signs of incoming bloom. These coreopsis are in my Austin home. Please advise! I also planted the same coreopsis in my other house in Ponca City Oklahoma. They just started showing a few blooms. It seems like thay are more foliage than blooms. Please advise!

ANSWER:

The description you give for your coreopsis plants makes us think that they are getting too much nitrogen. High soil fertility will result in lots of plant and foliage growth, but suppress flowering. If you've been feeding your coreopsis it would be a good idea to stop, or at least decrease the amount of nitrogen in the fertilizer. Some natural fertilizers, especially manure-based ones are especially high in nitrogen. Plants receiving too much nitrogen will typically have very dark green, leathery foliage.
 

More Wildflowers Questions

Root lengths of Central Texas wildflowers
March 10, 2009 - I'm looking for lengths of the roots of wildflowers of Central Texas. It would be particularly helpful to know the really long ones. Any native prairie flowers or grasses would do.
view the full question and answer

Native Plants for Galveston
February 12, 2012 - I'm looking for low maintenance, drought tolerant plants for Galveston, on the bay side, in a well drained area with morning sun. I was thinking of Phlox, Muhly grass, Lantana.....and I am looking f...
view the full question and answer

Lupines annual or perennial in Zone 4b from Austin
November 08, 2012 - Are lupines treated as perennials or annuals in Zone 4b (Northeast) if they are planted in the ground? Will other native species of lupines grow in a region they are not native to? Any recommendations...
view the full question and answer

Smarty Plants on Virginia crownbeard
January 29, 2005 - I recently moved to the Hill Country and notice some "weeds" that seemed to into explode into ice formations when the temperature first fell below freezing. Can you tell me the name of this plant an...
view the full question and answer

Germination of bluebonnet seeds in Hempstead, TX
April 01, 2008 - We scattered 20 lbs of bluebonnet seeds on our property near Hempstead. Only about 10 plants have come up even though on another part of the property we have thousands. It is well drained and in sun....
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.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP | STAFF
© 2015 Lady Bird Johnson Wildflower Center