En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Problems with Thuga occidentalis in Canton MI

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

Monday - May 11, 2009

From: Canton, MI
Region: Midwest
Topic: Diseases and Disorders
Title: Problems with Thuga occidentalis in Canton MI
Answered by: Barbara Medford

QUESTION:

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?

ANSWER:

Thuja occidentalis (arborvitae) or white cedar is a widely-used evergreen hedge plant. We found out that the 'Emerald' cultivar is also referred to as 'Smaragd' and is considered a smaller version of the traditional plant. About the only clue we found is that after an especially cold winter, the foliage will turn yellow-brown. That's not orange, and if your neighbors are not having the same problem, then we can only think that there must be some kind of stress on your trees that the others are not experiencing. Have your plants been watered sufficiently? Are they in the neighborhood of a large tree that might have roots interfering with your arborvitae? Have you examined the tree for bagworms? Here is an article from Ohio State University on arborvitae that includes some of the things that can cause problems with the tree and that mentions the 'Emerald' cultivar.

 

More Diseases and Disorders Questions

Swarming insects on non-native willow in Washington PA
September 25, 2011 - I have had a very large, beautiful pillow willow bush/tree growing next to our garage for about 8 years. Last year at the end of August, it began to attract white-faced hornets and yellow jackets by t...
view the full question and answer

Overwatering and fertilization of whiteleaf manzanita
July 27, 2007 - Hi, I have an Arctostaphylos Dr. Hurd, southern California coast, several years old, 10 feet, that has a few large branches with yellowing and spotted leaves... also dropping many. causes? remedy? sh...
view the full question and answer

Problems with Ashe juniper from Lakeway TX
May 25, 2013 - Dear Sir/Madam, I have been living for the last three years in Lakeway, Texas approximately 20 miles west of Austin. In my back garden there are several ashe junipers about 15-20ft tall. However...
view the full question and answer

Incorrectly planted anacua from San Antonio
November 22, 2013 - I purchased a 12' anacua tree from a local nursery about 18 months ago. It was not planted correctly (root bound, rolled into a hole about 3" larger than the pot) but is still alive with the number...
view the full question and answer

Hypoxylon Canker removal in Austin TX
March 26, 2012 - I have several oaks that appear to have been killed by Hypoxylon atropunctatum from last summer's drought. Is it safe to cut them down in March or does that risk spreading Oak Wilt too. Should I ...
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