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

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

Seedball Germination in Dallas, TX
May 27, 2015 - Last Fall we created thousands of seedballs with Lady Bird's wildflower seed mixture, compost and clay, and planted them along a bike trail in Dallas, Texas. We are so disappointed because nothing h...
view the full question and answer

History of the Texas Bluebonnet
March 12, 2008 - Hi, I'm working on an article for a newspaper and wondered if you could point me in the right direction to find out the history of the bluebonnet. When did it become the state flower? Is it really ill...
view the full question and answer

Smarty Plants on Germination
July 23, 2004 - I just planted wildflowers and I was wondering how long before I know if they will grow?
view the full question and answer

Native Plants for a Shaded Patio Container in Missouri
April 17, 2015 - What kind of native plants would grow well in a pot on a fully shaded patio? I live in Kansas City, Missouri. The patio faces north and doesn't get any direct sunlight, but it gets lots of indirect...
view the full question and answer

Varieties of lupines that will grow in Zone 7, Alabama
October 27, 2006 - I have just found you and read 500 plus questions, fascinated. My question concerns plants in Alabama, is there a variety of lupine that will grow is zone 7, sun or shade? Also, we purchased acreage t...
view the full question and answer

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