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

How soon after stump grinding can something else be planted?
January 18, 2009 - How soon after cutting down a Mulberry and grinding up the stump can we plant a new tree in its place?
view the full question and answer

Desert Willow tree for Plano, TX
March 03, 2013 - I live near Dallas, Texas. I have a small Desert Willow tree that I would like to plant. What is the root system of this tree like? Would I be able to plant it near our patio? How far from the house'...
view the full question and answer

Source for information on Habiturf from Utopia, TX
February 25, 2014 - During a recent Central Texas Gardener TV show, someone from the Center mentioned that your Habiturf was going to be available as sod from someone in the San Antonio area this spring. Is that true an...
view the full question and answer

Tolerance of rosa setigera of acidic soil from Cobden IL
October 20, 2012 - How tolerant is Rosa setigera of acid soil? I would like to plant it in my (very large) garden but the loess soil has a pH of 4.5. Thank you.
view the full question and answer

Restoring disturbed land in Marshall, TX.
December 04, 2014 - I have a 30 acre tract of land in Marshall, Texas. The oil company has turned 2-3 acres surrounding the rig into gravel. I would like to return the gravel area to green space. Any suggestions on gras...
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