En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Leaves dropping on evergreen sumac in San Antonio

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
1 rating

Wednesday - January 11, 2012

From: San Antonio, TX
Region: Southwest
Topic: Diseases and Disorders, Drought Tolerant, Trees
Title: Leaves dropping on evergreen sumac in San Antonio
Answered by: Barbara Medford

QUESTION:

I have a large evergreen sumac in my back yard that started off as a small shrub 10 years ago. This summer the leaves turned red and now have dropped off. Is the plant dead? It sent out two smaller plants which look fine so far, but I don't want to lose them either. Local plant experts can't figure out what may have happened, since I have done nothing different to the plant or my yard in the entire time I have lived here.

ANSWER:

Rhus virens (Evergreen sumac) is, according to this USDA Plant Profile map, native in the area of Bexar County. It is not a true evergreen; like live oaks it drops its leaves in the Spring, which are quickly replaced by new leaves. The two small plants that you are seeing are actually shoots, still part of the original tree, and emerging from the same root. We are guessing, although this tree is drought tolerant, that our unusually hot and dry weather caused it to be drought-deciduous, dropping its leaves early to protect the roots.

You aready know, because of the shoots, that the roots are still alive. Use the thumbnail test to see if any of the stems have died. Beginnning fairly close to the top (or as high as you can reach) scrape off a very thin layer of the bark with your thumbnail. If there is a thin layer of green beneath the bark scraping, that trunk is still alive. You can check other areas or branches and, if you find no green layer, move farther down on the same branch.

We could find no projected age for this plant, but its mature height is usually about 8 to 10 feet. We did find information saying it could tolerate extra watering if it was in a well-drained soil but since, as you say, the care for it has not changed in 10 years, we doubt that could be the problem. At this point, we prescribe patience. If you found the green underskin, it is probably just waiting for better times. Leaves should begin to reappear in the Spring, per schedule.

 

From the Image Gallery


Evergreen sumac
Rhus virens

Evergreen sumac
Rhus virens

Evergreen sumac
Rhus virens

More Drought Tolerant Questions

Drought tolerant plants native to Plano, TX
July 13, 2006 - I live in Plano Texas. We have drought conditions and I would like to redo our landscape with flowers that can handle Texas weather annually. My desire is: 1. Year round blooms 2. The ability ...
view the full question and answer

Drought tolerant plants for MA
August 28, 2011 - We have some very very poor soil at our house on Cape Cod and are looking for plants that will take low water and sandy soil. Also we are high on a hill and quite exposed to the elements. The plot get...
view the full question and answer

Sun loving plants for flower bed by the pool in Weatherford Texas
October 03, 2011 - We have a 40' long x 2 1/2' wide flowerbed along our pool. It is in full sun with the pool deck across the front and a 6' privacy fence across back. Also, the level of the bed is 18" below the l...
view the full question and answer

Environmentally friendly and drought resistant alternatives to St. Augustine grass
September 28, 2006 - As a member of the planning committee of our property owners association in Wimberley TX, we are researching ways to make our landscape environmentally friendly and drought resistant. We have 60,000 ...
view the full question and answer

Flowering Deer Resistant Ground Cover for Dry Rocky Soil: Alabama
March 26, 2012 - My question has been partially answered in the FAQ but I live in Birmingham where the soil is clay and rocky so it's a little different. I want to plant on a rocky slope (small rocks like the size of...
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