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Evergreens in the winter

January 23, 2014
By Stephanie Bethke-DeJaeghere , Marshall Independent

Browning or bleaching of evergreen foliage during winter occurs for four reasons: Winter sun and wind cause excessive transpiration (foliage water loss), while the roots are in frozen soil and unable to replace lost water. This results in desiccation and browning of the plant tissue. Bright sunny days during the winter also cause warming of the tissue above ambient temperature which in turn initiates cellular activity.



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