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I have a flame amur maple approx 5 feet high and has been planted since spring of '07. It has turned a very pale yellow color and has several branches where the leaves look like they have been burned. It is getting sufficient water. I've noticed that other flame maples stay green and I have read that it should. I don't know what is wrong with it. Help. It also did this last summer. I have applied some iron and it did green it up a little more but not much.
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Amur Maples are very prone to iron chlorosis. This is a deficiency of iron within the plant and usually appears in the new growth each year in susceptible plants. It is typically due to the high pH (alkalinity) of our Utah soils. For specific recommendations on how to remedy this problem I am attaching a link to a USU Fact Sheet http://extension.usu.edu/files/publications/publication/AG-SO-01.pdf. Feel free to contact me if you have any further questions.
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