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

Monday - June 27, 2011

From: Tulsa, OK
Region: Southwest
Topic: Diseases and Disorders
Title: Changing bloom color from Tulsa OK
Answered by: Barbara Medford

QUESTION:

How do you change the bloom color?

ANSWER:

How do I change the bloom color of what? In Alice in Wonderland, the gardener cards changed the white roses to red with a paint brush. It wasn't very successful and they were marked out to have their heads off, but Alice woke up so we'll never know how that came out.

We have been asked before how to change flower color. The only flower we have personal experience with changes of color is the Hydrangea. From the United States National Arboretum website on Hydrangea Questions and Answers, we found this excerpt about why the same species would be blue in one part of the country and pink in another. There are only two hydrangeas native to North America, Hydrangea arborescens (Wild hydrangea) and Hydrangea quercifolia (Oakleaf hydrangea). Only H. arborescens is native to Oklahoma.

"Flower color in H. macrophylla is dependent on cultivar and aluminum availability. Aluminum is necessary to produce the blue pigment for which bigleaf hydrangea is noted. Most garden soils have adequate aluminum, but the aluminum will not be available to the plant if the soil pH is high. For most bigleaf hydrangea cultivars, blue flowers will be produced in acidic soil (pH 5.5 and lower), whereas neutral to alkaline soils (pH 6.5 and higher) will usually produce pink flowers. Between pH 5.5 and pH 6.5, the flowers will be purple  or a mixture of blue and pink flowers will be found on the same plant."

Our experience with this was that hydrangeas came up naturally with blue flowers in the acidic soil of East Texas. In North Central Texas, with its alkaline soil, they came up pink.

From All About Gardening, here is an article on factors that influence a flower's color.

From WillTaft.com, Do Iris Flowers Change Color? From that, notice this paragraph on artificially changing bloom colors:

 "Also, you can’t change the color of an iris by changing the soil pH., or anything else in the soil. That sometimes works with hydrangeas, but not with any other plants that I know of.  The color of an iris, for example,  is a result of its genetics.  The rhizome of an iris that produces a purple flower will continue to produce that same color."

So, we still are not sure what you were asking, but we've told you about all we know about the subject. Trying to alter the soil to induce plants to bloom in an unnatural color doesn't work. Even with aluminum additives in alkaline soil, the change to blue of hydrangea blooms will not last long as the additives are absorbed and move in the soils.

We don't recommend paint.

 

From the Image Gallery


Wild hydrangea
Hydrangea arborescens

Wild hydrangea
Hydrangea arborescens

Oakleaf hydrangea
Hydrangea quercifolia

Oakleaf hydrangea
Hydrangea quercifolia

More Diseases and Disorders Questions

Diagnosis of problems with Texas ash
June 07, 2006 - Our 15 year old Texas ash has less leaf production this year. It also has a small amount of algae on the trunk, and some of the branches have small white spots on it. Also, a few of the branches close...
view the full question and answer

Yellowing of St. Augustine grass in south Texas
June 04, 2009 - We live in deep south Texas, Roma, Texas to be precise and we have a problem with our San Augustine grass. In the spring its quite nice and green after a few weeks and one rain it is turning yellow.
view the full question and answer

Growing Dwarf Yaupon Holly in Texas
December 04, 2013 - We planted 10 extra dwarf yaupons in our Austin front yard. They were identified as 'Gremici' dwarf yaupon. I googled them to get more information about them in order to determine why five have di...
view the full question and answer

Natural lifespan of wild plum trees
May 12, 2008 - We have a small border of Wild Plum Trees in our yard. Every year it seem that one or two of the biggest trees die. Do they have a specific life span? We transplanted the trees/bushes from the panh...
view the full question and answer

Transplant shock in Achillea millefolium
May 28, 2007 - I had a clump of yarrow in my garden and was worried that it would become very aggressive to the other plants. I decided to transplant it into large clay pots to control it. Immediately after the tran...
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