Knowledgebase
Yellowing Maple tree. #275428
Asked September 03, 2015, 3:53 PM EDT
Hi, 1st time I have ever used this service.
We have a lovely great big Norway Red Maple. Last year the leaves on half the tree started turning yellow and this year they have all turned yellow. We have fed it lots of iron liquid in ground and spray. Still yellow? Have asked and received many answers. So time to ask where I should have started. How do I handle this? Please advise me what to do. Thank You,
John Schrenk CSU 1960
Douglas County Colorado
Expert Response
As you've clearly heard before, iron in Colorado soils is plentiful, but due to the alkaline nature of the soils, the iron is insoluble and generally unavailable to tress, grass and other plants. While iron supplementation can help reduce leaf yellowing of your maple trees, many treatments are ineffective. Even with more effective treatment options, generally administered by a certified arborist, maple trees still don't get as much iron as they truly need and consequently, can have a reduced life span here in Colorado. If you haven't already, you might want to contact a certified arborist for evaluation and treatment of your tree. Here is a list of arborists in Douglas County, Colorado:
Keith Worley
Forestree Development
Larkspur, CO 80118
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Jay Carter
Consolidated Arborists of CO Centennial, CO 80015
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William Ostrowski
Tree Medicine Tree Service
Englewood, CO 80150
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Kelly Gouge
Swingle Lawn & Tree Service Littleton, CO 80122
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Sarah Smith
White Oak Arbor
Littleton, CO 80123
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Christine Phillips
AAA Emergency Tree Service Denver, CO 80209
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M. Manning
Commonwealth Tree & Garden Denver, CO 80129
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Kevin Jones
Jones Tree & Lawn
Arvada, CO 80002
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Terrence Sheldon
A-1 Stump Removal & Tree Care Arvada, CO 80003
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David Merriman
ArborScape
Castle Rock, CO 80104
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Mike Landers
Mike Landers Tree Service
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Josh Theibald (2014)
Root Tree Service
http://www.roottreeservice.com
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Brett Lemaire (2014)
Knothead Tree and Lawn Care
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-Douglas County Master Gardeners