Chlorophyll isn’t the alone player in the autumn leaf-color game. Some tree species begin to produce other pigments: beta-carotene, anthocyanin, flavonols. When the seasons begin to change, the production of Chlorophyll slows to a halt. That is what changes forests yellow, oranges and red.
For The Washington Post, Lauren Tierney and Joe Fox mapped autumn foliage colors across the U.S.
By the end of October, variations of yellow, orange, red and brown dominate, showing the coming of peak fall foliage in the western and northern United States. Come end to November, all except the southern counties of the U.S. are past peak point.