Fall is officially here, and so is the foliage!
Fall is a time when the species composition of forests is expressed in bright color. The summer forest is shades of green, but as days get shorter and trees stop making chlorophyll, underlying pigments of yellow and orange are revealed.
The sequence begins with “the poor, unhealthy leaves that had a rough summer...” observes Former VT parks commissioner, Mike Snyder, in a podcast with Happy Vermont’s, Erica Houskeeper. They go "in this pale, dusky, muted way.” Once those leaves are gone, he says, the real show begins. “There’s still a lot of green left, and that green starts to change in much more vibrant, distinctive ways."
The timing and intensity of the colors depend on the weather each year, but in general, birch and poplars kick off the show with bright yellow leaves. Sumac also adds color early, turning brilliant red, often before many of the larger trees.
Maples usually start changing next, showing red, orange, and yellow. Maples make a special pigment called anthocyanin, which can turn the leaves red or purple. This happens when the weather is sunny during the day and cool at night. When chlorophyll breaks down in the fall, and conditions are right, the tree starts producing anthocyanin to help protect the leaves from damage by light and to allow the tree to recover nutrients before the leaves drop.
Oaks and beeches are slower to change and may turn later in the fall, with leaves turning brown or bronze. In fact, pale yellow beech leaves may hang on into winter, providing spots of color among gray trunks and limbs, long after all other leaves have fallen.
Curious where the best and brightest colors are? Check out the foliage maps below:
NH Fall Foliage Tracker
VT Fall Foliage Tracker
Looking for some local hiking recommendations? Here are a few of our favorites:
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Smith Pond Shaker Forest (either from Smith Pond or from Half Mile Pond)
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Morey Mountain (great viewpoint both southerly and northerly along the Ct River)
- Lone Oak Trail (view southerly down the CT river where the Wells River and Ammonoosuc River enter)
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Mountain View (looking up at Smarts and Cube).
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