The fall colors have been in the leaves all along, but they were masked by chlorophyll, a green pigment that combines with sunlight to produce food in the form of sugars for tree growth. It might surprise you to know that this rebirth of color is caused by fewer hours of daylight, not “Jack Frost.” A “chemical clock” activated by shorter days tells trees to shut down chlorophyll production in preparation for winter. So in the fall, trees use chlorophyll faster than it’s produced. This removes the green mask and the brilliant fall color show begins.
Fall color typically peaks in mid-to-late October. Because Southern Ohio and Kentucky have such a diverse climate and soil composition, many tree species common to both northern and southern states grow here. This provides a variety of fall colors for us to enjoy as we walk or drive through state and local parks and national forests.
Read the Full Article by Mike Klahr (Cincinnati.com) Here