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

Saturday - May 30, 2009

From: Buda, TX
Region: Southwest
Topic: Compost and Mulch, Diseases and Disorders, Shrubs
Title: Problems with Green Cloud purple sage in Buda TX
Answered by: Barbara Medford

QUESTION:

I planted the "Green Cloud" variety of purple sage about 3 years ago. Yesterday, I noticed yellowish dots on the underside of the leaves of some plants. Is this harmful? The plants seem to be ok at this time, but I'd like to prevent any problems that might be brewing. I thought about the cotton root rot, but we have been in a drought.....not much water here (however,the area is heavily mulched).

ANSWER:

There are 5 plants in our Native Plant Database with the common name "purple sage;" however, only one of them, Leucophyllum frutescens (Texas barometer bush), is native to Texas, so we will assume that it the one you are asking about. The species of this plant usually has silvery green foliage; "Green Cloud" is a selection which has green leaves and pinkish flowers. Pictures of Green Cloud.

We investigated the possibility of cotton root rot, but understand that this plant is pretty resistant to it. Another thing causing yellowing on leaves is chlorosis, the lack of cholorophyll, which is usually the result of the plant roots being unable to access trace elements, especially iron, in the soil. The key to both these problems is the drainage for the plant. Cotton root rot, for instance, is prevalent in calcareous clay loam, where drainage is poor. Chlorosis can be precipitated by too little drainage as well. So, the first thing you want to do is check that water is not standing on the roots of your purple sage. If water in a shallow depression stands there for more than about 30 minutes, your drainage is poor. You need some compost in the dirt in which the sage is planted, or it should be in a raised bed. Pull some of that mulch back, and work some decomposed matter into the soil as much as possible without damaging the roots. Let the lower branches get some air. Try gradually getting the air circulation improved and getting organic material into the soil, and see if that helps.


Leucophyllum frutescens

Leucophyllum frutescens

 

 

 

More Shrubs Questions

Sprout from a non-native sago palm in Poinciana FL
October 16, 2013 - I have two mature (10 years old)sago palms. One of them sprouted a new "head' at the top of the trunk. It is competing with the original one. It is not a pup coming from the root area. Can I cut it ...
view the full question and answer

Webs on limbs of evergreen sumac from Austin
May 13, 2014 - We have a mature Evergreen Sumac (Rhus virens) that has spider webs on the end of some limbs. The end of the those limbs have died although new growth is coming on further up the limb. We live in th...
view the full question and answer

Evergreen shrub for hedge in Porter, Texas
December 24, 2010 - We are trying to decide on what would be good privacy hedges (at least 6 ft. tall) to run down our long backyard chainlink fences. I'm allergic to Ligustrums and we have 2 dogs and a cat which I hear...
view the full question and answer

How to plant a gooseberry bush
November 22, 2008 - Please, if somebody can help, I need to know how to plant the gooseberry bush. Thanks,
view the full question and answer

Replacement for pygmy date palms in Spring, TX
April 15, 2010 - We live in Spring, Texas and the front door of our house faces East. Last winter we lost both of our beautiful pigmy date palms! We are trying to find "unique" accent plants for our front entry. D...
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