Fall color is coming
Leaves are finally beginning to show signs of fall color (My picture is a few years ago, however). The early reds of the sourwoods seem to have been muted by drought, although the drought seems to have encouraged early leaf color in maples, probably as leaves have shut down production of chlorophyll early this year. My sister in Texas sent me an e-mail asking about what really triggered the change in color in leaves - temperature, daylength, moisture, or a combination. Her dog park group wanted to know! Well, what are sisters for, after all, especially if she's a botanist and garden educator? I had some fun reviewing the details and look forward to seeing how it will play out here, with the severe and continuing drought, and until today, unreasonably hot (for October) weather. Basically, our fall colors in the Eastern U.S. are revealed as chlorophyll production slows down, cued by the shortening days and lengthening nights. The interplay of pigments in leaves determines the fa...