Peak fall color in Chicago area now on display
When you understand the basics of fall color and monitor the weather, you will be able to formulate your own forecast for peak color. Peak fall color in the Chicago area is now on display. The best time to view this year's fall tree color is when the shrub layer and herbaceous layer of plants can perform a show that can last several weeks. The only constant factor influencing fall color from year to year is shortening day length, which signals changes in specialized cells called the abscission or separation layer in the petiole (the stalk at the base of a leaf). Changes in these tissues result in the accumulation of sugar in leaves as veins between the petiople and stem gradually close. The dominant fall colors vary by species, individual plants within a species, and leaf by leaf. Early frost may kill leaves before they have the chance to accumulate sugar or before chlorophyll is depleted to allow other pigments to be seen. Each season's fall color show may be different than in previous years.
gepubliceerd : 4 uur geleden door Tim Johnson in Lifestyle Science
I live northwest of Chicago, and I’m interested in your thoughts about this year’s fall color. When is the best time to view peak fall color at the Garden?
I often get asked when I think fall tree co... [3221 symbols]
