How area trees survive the winter
The make up and structure of trees which grow in our zone 3 environment are different than trees which need a zone 4 or a above to survive. Jeff Gillman, associate professor of horticulture at the University of Minnesota, writes about this in his book, "How Trees Die." The minimum temperature which trees can survive is only one factor. The wind also plays a major factor in a tree's ability to endure this climate. During the winter, the tops of trees become dormant to avoid potential damage.
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