En Español

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

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

Need help with plant identification, visit the plant identification page.

 
rate this answer
Not Yet Rated

Monday - February 25, 2008

From: Pflugerville, TX
Region: Southwest
Topic: Trees
Title: Life expectancy for Carolina buckthorn (Frangula caroliniana)
Answered by: Nan Hampton and Joe Marcus

QUESTION:

Someone recently told me that Carolina buckthorn only lives 4-5 years and I'm wondering if that is true. I had a nice one (on Blackland) that died suddenly in its fourth or fifth year, during the drought of '06 (with supplemental watering). Do you know the normal life expectancy of this plant?

ANSWER:

No, we don't have an exact life expectancy for Frangula caroliniana [syn. = Rhamnus caroliniana] (Carolina buckthorn). None of the standard tree guides (Robert Vines' Trees of Central Texas or Trees, Shrubs, and Woody Vines of the Southwest or Benny Simpson's Field Guide to Texas Trees) give an indication of lifespan for this small tree, nor do the more extensive plant manuals (Shinners & Mahler's Illustrated Flora of North Central Texas and Manual of the Vascular Plants of Texas by Correll and Johnston). The only source we found that does is the Texas Plant Information Database from Texas Parks and Wildlife which says it has slow growth and is short-lived. Other sources (Texas Tree Planting Guide and the Georgia Wildlife Federation) say that its growth is moderate. We do know that most sources agree that its maximum height is usually 15-20 feet, although some specimens may reach 35 to 40 feet. So, if we have a definition of what slow or moderate growth is, we can make an educated guess at normal life expectancy. As it turns out, we do have a definition. Michael Dirr in Manual of Woody Landscape Plants says:

"The designation slow means the plant grows 12" or less per year; medium refers to 13 to 24" of growth; and fast to 25" or greater."

So, if we take the upper end of slow (1 ft/year), it could take the tree 20 years to reach its maximum growth. If we take the upper end of medium (or moderate), it could take 10 years to reach its maximum growth. If we take the mid-range between the two, I think we could estimate the trees could live 15 to 20 years. Of course, that doesn't guarantee your tree will live that long; but, then, it might live longer than 20 years.

In our experience, Carolina buckthorn (especially the nursery-grown material) does seem to be susceptible to root and crown diseases—specifically, crown rust of oats according to University of Florida Extension Service. Jill Nokes in How to Grow Native Plants of Texas and the Southwest says that the terminal stem and leaves of plants 4 or 5 feet high in five-gallon containers may suddenly turn brown and the plants quickly die. She also says that transplanting into larger containers after seed germination often causes death of as many as 30% of the plants. She doesn't give a specific disease that causes these deaths.


Frangula caroliniana

Frangula caroliniana

Frangula caroliniana

 


 

 

More Trees Questions

Bugs on Arizona Cypress in Bellwood IL
August 27, 2011 - I live in Illinois and have an Arizona Cypress that looks like it is dying but I notice today it has bugs inside its cone. Can you tell me why and what can I do?
view the full question and answer

Pruning non-native peach in Austin, TX.
June 18, 2015 - I planted two five gallon Texas Star peach trees last February but didn't have the nerve to prune them back to knee height. After having been convinced that this is a good thing to do, I'd like to k...
view the full question and answer

Evergreen tree for Southern California coast
July 06, 2010 - I need a tree that is evergreen, non invasive roots that is not messy that can be kept at around 20 feet. We are at the edge of the thermal layer from the ocean. Thanks.
view the full question and answer

Safe distance from foundation for Sycamore from Preston UK
August 24, 2011 - What would be the safe distance to have a sycamore tree near your house so it doesn't affect the foundations?
view the full question and answer

Registered/patented pecan by Foster W. Fort
August 01, 2010 - Hello, we own a historic house museum once owned by the Fort family of Waco, and have learned that Foster W. Fort developed a type of pecan tree and had an orchard somewhere here around Waco (possibly...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.

Bibliography

Field Guide to Texas Trees (1999) Simpson, B.J.

How to Grow Native Plants of Texas and the Southwest: Revised and Updated Edition (2001) Nokes, J.

Manual of the Vascular Plants of Texas (1979) Correll, D. S. & M. C. Johnston

Shinners & Mahler's Illustrated Flora of North Central Texas (1999) Diggs, G. M.; B. L. Lipscomb; B. O'Kennon; W. F. Mahler; L. H. Shinners

Trees of Central Texas (1984) Vines, Robert A.

Trees, Shrubs, and Woody Vines of the Southwest (2004) Vines, R. A.

Search More Titles in Bibliography

E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | JOBS | SITEMAP | STAFF INTRANET
© 2016 Lady Bird Johnson Wildflower Center