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Why do leaves change color? 

 

Fall Fertilization
Learn what you should be doing in the autumn to prepare your trees for the winter.

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Part 1 | Part 2 | Part 3 | Part 4 | Part 5

The blazing reds and purples are produced by yet a third family of chemicals, anthocyanins, which in turn are manufactured as the by-product of sunlight on sugars within the leaf when its supply of phosphates begins to disappear. The production of anthocyanins varies with temperature and sunlight with the most brilliant displays following periods of bright, cool weather.

Next: Part 5

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