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

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 Herbs/Forbs Questions

Native Texas Hill Country nitrogen-fixing plants
June 07, 2006 - Please help me find a listing of native (TX Hill Country) nitrogen-fixing plants.
view the full question and answer

Standing Cypress Plants in San Antonio, TX
June 26, 2013 - I purchased seeds for standing cypress 2 years ago and this spring they look beautiful. What is the best way to harvest the seeds? Also, will the current plants come back next spring or will I have to...
view the full question and answer

Shade and Drought Tolerant Plants for Idaho Shade
March 18, 2016 - I am looking for plants native to Idaho and/or the surrounding region (zone 6 or 7) that would do well in full shade conditions (adjacent to the north side of our house) and meet several criteria: Max...
view the full question and answer

Effect on taste of honey from pollen gathered by honeybees in Appleton WI
March 09, 2014 - in the flower box.. We are planting perennial or self-planting annuals on our fields and open areas to feed honey bees for our apiary. We found a source and then lost it telling what effect these wil...
view the full question and answer

Pruning pink skullcap and rock daisy from Austin
February 06, 2013 - I have some pink skullcap and rock daisy and other plants in my yard that never entirely die back over the winter. Can you tell me what kind of pruning is appropriate? How far can/should I cut them ...
view the full question and answer

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