The leaves are starting to fall and colors are starting to change in Duluth and along the North Shore. Let us know where you are in the Northland and if you are seeing any great fall colors yet.
Four main groups of biochemicals are responsible for the various yellows, oranges, reds and browns that we see in the fall — chlorophyll, carotenoids, anthocyanins and tannins. Each has its own color and chemistry. Varying amounts of these chemicals will give subtle variations in color from one leaf to the next or even from tree to tree.
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