En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Rose canker in roses on cedar posts

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

Thursday - May 24, 2007

From: Dripping Springs, TX
Region: Southwest
Topic: Diseases and Disorders
Title: Rose canker in roses on cedar posts
Answered by: Joe Marcus

QUESTION:

While visiting the wildflower Center I saw that some of the plants were growing on trellis' made of posts cut from cedar trees. I made a trellis for my climbing rose bush and where the stems touched, turned black and the rose also turned black. Are there only a certain kind of plants that can climb my cedar trellis?

ANSWER:

It is likely that your roses were attacked by a fungal disease which gained entry through contact wounds caused by rubbing against the rough cedar bark. The likeliest candidate would be a disease called rose canker. Many roses, especially the non-native ones, are susceptible to a host of diseases. Pruning out diseased canes and using good cultural practices may be all that is required to rejuvenate your rose.
 

More Diseases and Disorders Questions

Problems with Thuga occidentalis in Canton MI
May 11, 2009 - I have emerald arborvitae that have become very "shaggy" and somewhat orange at the base of some leaves, while my neighbors look compact and dark green. What am I doing wrong?
view the full question and answer

Rust-colored spots on Lantana?
June 05, 2009 - Mr. Smarty Plants, I live in Cibolo TX and my lantana plants are about 3 years old. They have done exceedingly well until this spring. The leaves have developed brown, rust colored spots and the le...
view the full question and answer

Growth on miniature palm in Los Gatos. CA
October 01, 2009 - I think that my miniature palm is infested with some sort of bug or fungus. Last night it looked fine but this morning there was a large bright yellow fuzzy looking growth on the trunk. Any input wo...
view the full question and answer

Loss of bloom on Fremontodendron californicum in California
June 11, 2009 - The flowers on my Flannel Bush all died at once I have noticed a sappy substance at the base of the trunk. There are still some flowers on bush but most are dead. It has been blooming since Feb. Is ...
view the full question and answer

Newly planted nuttall oaks from Houston TX
November 16, 2012 - I recently purchased two Nuttall Oak Trees in Houston Texas (October). They are both 15' or taller. I planted them within 24 hours of being delivered, watered them in, staked them, and within 3-4 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
© 2014 Lady Bird Johnson Wildflower Center