Colors - Knowledgebase Question

Lee\'s Summit, Mo
Question by bvance1
September 20, 2005
Why do some plants and trees only change colors
in the fall time?

Answer from NGA
September 20, 2005


The seasonal color change has to do with chemical changes inside the foliage. Those that are sensitive to the shortening day length and to cooler temperatures undergo seasonal change as preparation for their winter survival; as chlorophyll levels drop the remaining pigments in the leaf become visible.

Here is a more detailed explanation of what happens. You may need to cut and paste the complete url into your browser to make it work correctly.

For a slightly less technical explanation, try this one.

I hope this answers your question.

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