The mixture of red, purple, orange and yellow is the result of chemical processes that take place in the tree as the seasons change from ... the leaves stop their food-making process. The chlorophyll ...

Warm days and cool nights tend to produce the best fall color. A 2021 study suggested that Northeastern U.S. maple leaves are changing later—though climate change can also bring dry weather ...

Read Dr. Don Leopold's Guide to Fall Colors in Upstate New York with color images of dozens of ... that take place in the tree as the seasons change from summer to winter. During the spring and summer ...