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

Sunday - October 07, 2007

From: Austin, TX
Region: Southwest
Topic: Soils, Shrubs
Title: Potting soil recipe for azaleas
Answered by: Barbara Medford

QUESTION:

I have a couple of Azaleas in pots that need repotting.I can't remember the recipe for the medium I put them in last time other than pine bark mulch. I think there were three ingredients. What is your recommendation?

ANSWER:

Even Mr. Smarty Plants can learn something new. We thought something as exotic-looking as an azalea must surely be a sub-tropical non-native. But, a search in our Native Plant Database turned up 26 native varieties. Not that it has to be native to be grown in a pot, of course, but at the Lady Bird Johnson Wildflower Center we try to concentrate on the care and propagation of plants native to North America. Turns out that azaleas include not only natives to North America, but we found 3 native to Texas! Among the other things we learned is that all azaleas are rhododendrons but not all rhododendrons are azaleas. We learned that wild azaleas are found on every continent except Africa and South America, with Southwestern China and Papua New Guinea having the most species. They have been hybridized for hundreds of years, and in the U.S. the natives do best in the Pacific northwest where rainfall is plentiful and winter temperatures are not too low. For more information, go to this site on Care of Azaleas.

But that's not what you asked, was it? You wanted a recipe for potting soil for containerized azaleas. On the above-mentioned website, we finally found a recommended recipe. We don't know if this was the one you were thinking of, but we hope so. It calls for equal proportions of peat moss, vermiculite, potting soil and coarse sand.

And, since we found those Texas native azaleas, let us tell you about them. They are Rhododendron canescens (mountain azalea), Rhododendron oblongifolium (Texas azalea), and Rhododendron prinophyllum (early azalea), pictures below.

 


Rhododendron canescens

Rhododendron oblongifolium

Rhododendron prinophyllum

 

 

 

 

More Soils Questions

Growing bluebonnets in pot in Flower Mound TX
November 01, 2011 - We received a package of bluebonnet seeds along with the DVD Wildflowers: Seeds of History as a gift. In the film, Andrea DeLong mentions that bluebonnets did not grow well in a rich organic soil. W...
view the full question and answer

Need help growing plants in red dirt in Mount Pleasant, NC.
September 17, 2011 - I live in N.C. and I have had the hardest time getting plants to grow;I have red dirt at my house. Can you suggest a few colorful plants that would do real well in red dirt? Thank You So Very Much!!!!...
view the full question and answer

Planting Mountain Laurel grown from seeds in Argentina
April 09, 2014 - Hello, I was transferred to Cordoba, Argentina 2 years ago from San Antonio, the climate hereis similar to S. TX, anyway I brought some mountain laurel seeds with me and they have been in 2 gallon pot...
view the full question and answer

Plant mistakes from Cedar Park, TX
April 09, 2014 - At our "Wilts End" in Cedar Park, TX. and are looking for a tall shrub/tree that will hide a 6-ft tall concrete wall and muffle the noise from a busy street. The wall forms a very wide-angled V shap...
view the full question and answer

Flowers under pine trees from Elkhart Indiana
May 02, 2013 - I have a number of pine trees at the back of my lot and would like to plant flowers under the tree. What can I plant?
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