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bonsaiTALK Master
Join Date: Nov-2003
Location: Whitefish Montana
Country: United States
Posts: 465
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Elms and maples almost always will suffer branch die-back if they are not root-pruned yearly.
Your trees are just suffering from the heat.
Jerry
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Jerry Meislik
Whitefish Montana USA
Zone 4-5
http://www.bonsaihunk.us/
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