Evergreens, as their name implies, stay green year-round – unlike deciduous trees which drop their foliage with the onset of winter. Most – but not all – conifers are evergreens. Here in New Hampshire (and New England), we have a wide variety – with the Pine Tree recognized by everyone.
So why do evergreens stay green year round?
These trees originated in cold northern climates. Because trees use light (photosynthesis) to make food, and because the growing season is limited, these trees adapted. Botanists discovered that needles are in fact regular leaves that are tightly rolled up, or flat with a waxy coating. This wax helps to save water during summer and winter. Even evergreens ‘rest’ during some of the winter, since trees can only photosynthesize when water is available. When it’s in the form of snow or ice, the trees are dormant.
One conifer that is not an evergreen is the Tamarack. Another is the Redwood. These trees’ needles turn yellow in the fall and drop. (By the way, both of these trees do well in New England.) Conifers are also among the oldest and tallest trees on the planet. (Click here to see amazing photos of the oldest trees in the world!)
For answers to questions about your evergreens, call Tim Bradley – Bradley Tree and Landscape – certified Arborist.
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