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

Cutting Back Perennials in the Fall?
November 13, 2013 - We have large beds of flowering native perennials that we planted around our house as part of a landscape conservation plan (various Joe-Pyes, goldenrods, turtlehead, blazing star, brown-eyed Susans)....
view the full question and answer

Red buckeye not blooming in NY
July 04, 2011 - I planted my red buckeye in September 2007 and it was about 18 inches tall. It is now a few inches short of 5ft. tall. I have had it in the ground for nearly 4 yrs and it has never bloomed. I have fr...
view the full question and answer

Treating suspected drought-stressed live oak
July 13, 2011 - I have a live oak with excessive leaf drop - it was planted approx. 20 year ago surrounded by heavy pavers. very little grass - I did not plant the tree - I have noticed in the last few years the dro...
view the full question and answer

Desert Willow and Orchid tree with no upper leaves from Kerrville TX
May 30, 2013 - I have two 5 year old Desert Willows planted in my yard. This year only one has leaved out and blooming. The other is bare but the branches are not dead and it has new growth at the bottom. Do you kno...
view the full question and answer

Small tan balls on oak from Pipe Creek TX
May 21, 2014 - Dear Mr. Smarty Plants, our spanish oak is growing tan colored lumpy balls about the size and weight of a marshmallow..sometimes just one at the end of a short stem and sometimes 2-3 clumped together....
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 | STAFF
© 2015 Lady Bird Johnson Wildflower Center