En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Dandelions in bluebonnets in Bastrop TX

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 - May 31, 2012

From: Bastrop, TX
Region: Southwest
Topic: Invasive Plants, Non-Natives, Pests, Wildflowers
Title: Dandelions in bluebonnets in Bastrop TX
Answered by: Barbara Medford

QUESTION:

I have a 20'x60' front yard area where I planted bluebonnets. It has become horrifically inundated with dandelions. How do I eradicate the dandelions while preserving the bluebonnets ? Thanks for your help.

ANSWER:

The much beloved Lupinus texensis (Texas bluebonnet) is an annual which drops its seeds in late Summer to early Fall. Those seeds lie in the soil until (hopefully) winter rains permit them to wake up and germinate. By January, rosettes are beginning to form and will be followed by blooms in a few weeks.

Taraxacum officinale (common dandelion) is, alas, a perennial with a long, deep taproot. Once it begins to bloom, it keeps on blooming and is very hard to get rid of. The seeds are wind-blown, it does not need pollination and the blooms can turn into seed heads overnight.

Here is an article from wildmanstevebrill.com that is both funny and informative. More informative (and less funny) is this Integrated Pest Management Online article about dandelions. Just to summarize: allow no flower to seed out, grub the root out but note that it can regenerate. From that last article, this extract:

"Spot treatment with glyphosate can control existing dandelion plants, but do not allow the spray or drift to contact desirable plants or injury will result."

We suggest that if you have a real bad-boy root that you get some small disposable sponge paintbrushes, cut off the plant as far down on the root as you can and, within five minutes, use the paintbrush to cover the cut end of the root with the glyphosate before the root can heal over to protect itself.

Beyond that, do your best for the bluebonnets and your worst for the dandelions. Good luck!

 

More Wildflowers Questions

More on bluebonnets
March 23, 2005 - When (month and week) do you think the "peak of bluebonnet blooming" will be this year in the Austin, Fredericksbug, and Llano, Texas area?
view the full question and answer

Are Texas wildflowers dying out from Portland, TX
January 27, 2011 - I am doing a school project on whether or not wildflowers are dying out in the state of Texas or not. I need to find a specialist who specializes on this subject. Could you help me??? Please contac...
view the full question and answer

Problems with propagation of Indian Paintbrush (Castileja indivisa)
February 07, 2006 - We are growing Indian Paintbrush. I have 2-300 seedlings. They were sown with fescue and have grown beautifully. Now they are approximately 4-6 inches high, a few have bloomed and many seem to be dy...
view the full question and answer

More on bluebonnets
January 30, 2007 - When will the bluebonnets bloom in the Hill Country this spring? Please let us know. Thank you.
view the full question and answer

Time to sow wildflower seeds in Ft. Worth TX
January 07, 2010 - When do I sow wildflower seeds?
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
© 2014 Lady Bird Johnson Wildflower Center