En Español

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

Wednesday - September 01, 2010

From: Spring Branch, TX
Region: Southwest
Topic: Pruning, Watering, Herbs/Forbs
Title: Copper Canyon daisy leaves turning yellow in Spring Branch TX
Answered by: Barbara Medford

QUESTION:

My Copper Canyon daisies have grown well this year but the leaves are turning yellow. Any ideas?

ANSWER:

Tagetes lemmonii, Copper Canyon daisy, does not appear in our Native Plant Database. From other sources, we have learned that it is native to Arizona and Sonora, Mexico. Our database is a work in constant progress, and this plant apparently has not made it there yet.

We found one website Hill Country Native Plants with a little information on it. This USDA Plant Profile on the plant shows it as native only to Arizona. We did find a good article from the Native Plant Society of Texas A marigold for fall gardens

To sum up what we learned about this plant, it needs full sun to thrive, good drainage and an alkaline soil. It is a "day-length" plant, meaning it blooms the most heavily in the shorter days of Fall, and with some blooming in early Spring. 

You did not say if this was the first year for your plant in your garden. If it has grown well in past years, and is not doing as well this year, there must have been some change in the environment of your garden to affect it. If you had it in the ground last Winter, we know that your area had some very abrupt and unusual low temperatures. This plant is really a desert plant, and will freeze back, but ordinarily, if it is cut back, it will return in the Spring. The other point I would like to make is that Spring Branch, close to Houston, really has more East Texas acidic soils than western alkaline soils. And you have more rain than we have, for instance, in Central Texas or West Texas, so if the drainage in your bed is not good, the plant may be objecting to water standing on its roots. 

Pictures of Copper Canyon Daisy from Google. 

 

More Watering Questions

Watering newly-planted Afghan Pines
May 11, 2015 - I just planted some Afghan pines in Amarillo, tx (avg. rainfall about 2O in. Per year) What would be the appropriate amount of water and how often would I need to water during this time.
view the full question and answer

Mulching tree root in San Angelo, TX
April 02, 2014 - San Angelo, Texas is in a drought stage. Will it help our trees to mulch the base of them?
view the full question and answer

Patio plants suffering from heat in Austin
August 22, 2010 - My patio plants are burning up from the intense sun of Austin's August. Last year it even burned the leaves. Besides moving 40 plants to a shadier spot do you have suggestions on how to protect the...
view the full question and answer

Sudden death of Texas Mountain Laurel
April 14, 2008 - Last year, my 15-year-old Mountain Laurel died very suddenly. The leaves began to curl up and turn brown, and it was dead within about 15 days. What happened?
view the full question and answer

Suggestions for flowerbed in Mesquite TX
June 17, 2011 - I live in Mesquite and am new to the area. I am trying to make the flowerbed in the front of my house look better. I've planted some yellow roses and red roses but would like some perennial that bloo...
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 | JOBS | SITEMAP | STAFF INTRANET
© 2016 Lady Bird Johnson Wildflower Center