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

Tuesday - July 17, 2012

From: Redding, CA
Region: California
Topic: Diseases and Disorders, Trees
Title: Problems with maple tree in Redding CA
Answered by: Barbara Medford

QUESTION:

I have a 2 yr. old October Glory tree that is looking bad. It leafed out this spring, but not as much as the others. In total I have 9 red maples along a fence row about 15 feet apart. The trees on either side of the sickly one look great. They are watered deeply once a week. The leaves on the tree are a lighter green in color than the other trees, more sparse and look dry and wilted.

ANSWER:

According to this USDA Plant Profile map, Acer negundo (Ash-leaf maple) is native to Shasta County, in north central California. However, according to this Arbor Day Foundation website, what you have is a cultivar of Acer rubrum (Red maple) which, according to this USDA Plant Profile map, is native only to the eastern half of North America and not in California at all.

We like to check on whether or not a plant is native to the area in which it is growing, because if it is not, that could explain the problems the plant is having. However, in your case, this appears to be a problem with this one tree out of nine. A tree only two years old could certainly still be vulnerable to transplant shock. We're assuming that all your trees were planted at the same time and in the same manner, so if just the one has transplant shock, it must hark back to something that happened before or during the planting of that particular tree. The trees roots may have been rootbound when you bought it, and if they were not clipped to open up the root system, the roots could still be wrapping around in the shape of the pot and strangling the tree.

This Southern Living article on 'Autumn Glory' recommends it highly but also mentions transplant shock and root strangling. It is very difficult to correct errors made in planting. One possibility is that the roots of that tree have poor drainage, in which case the yellowing of leaves could be due to chlorosis. You could attempt a fix on that by adding an iron supplement to the soil around the suffering tree. Root damage may be preventing the new rootlets from accessing minerals and nutrients from the soil. Don't overdo it and treat only trees showing that symptom. Chlorosis is more likely to show up in alkaline soil but, again, if the other eight are all right, your soil is probably right for the maple.

 

More Diseases and Disorders Questions

Problems with maple in Denver
June 09, 2011 - I live in Denver, CO and planted an Autumn Blaze maple three years ago. It has done very well until about a week ago. The leaves are drying out and falling off and earlier today I noticed some bugs ...
view the full question and answer

What's causing holes in trunk of white oak tree in SouthBend IN?
June 10, 2013 - We have a huge White Oak in our backyard that is approx. 130 years old. This evening I became aware that there are several small holes around the trunk that appear to be oozing a dark sappy liquid. ...
view the full question and answer

Muhly grass slow to green up from Spring Hill FL
August 04, 2012 - Have lots of muhly grass planted 3 yrs ago. This yr about 1/3 are VERY slow. Still look like hay stacks. No pattern in the bed. You mentioned pesticides being too close?
view the full question and answer

What to do with a sickly American elm in Austin, Texas
September 27, 2010 - I have an American elm that is about 6 feet tall in my yard. It is has not grown quickly this year--as compared to another American Elm that I have in another spot that is about 3 feet tall and has m...
view the full question and answer

Failure to bloom of non-native Althea in Oklahoma
August 17, 2008 - I have 2 Althea bushes that will not bloom. For the past 2 years, they become covered in buds, which eventually yellow, but never open. The buds are fully developed. This year the branches have starte...
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