There are two phenology sites within Green-Wood—Valley Water and Vista Grove. Valley Water is located close to the perimeter of the Cemetery, where the plant life is exposed to more artificial light at night. The Vista Grove site is located in a valley between sloping topography, with a higher density of surrounding canopy, and is over 700 meters away from an artificial light source. In our efforts to understand how climate change and urbanization affect the ecological dynamics of our city our sites include species that are common street and park trees. We seek to examine whether the quantity of light pollution influences the timing of life-cycle events.