RBC I What causes leaf color to change from green to yellow or red in the fall?
It’s a combination of light, temperature and available water. With less light on short days, trees and shrubs return to an energy-saving mode to survive the winter. Short days and falling temperatures signal trees and shrubs to quit producing chlorophyll, which converts sunlight into sugars through a process called photosynthesis.
As chlorophyll breaks down, leaves reflect the remaining…
