leaves falling

Discussion in 'Plants: Science and Cultivation' started by Unregistered, Nov 12, 2005.

  1. Why do leaves fall. Is it because of the cold weather or is it because the equinox and time associated with the sun being out during day and night. I live in texas , my wife states that the cold weather tells the tree to start loosing leaves , but i think it's because of the day night ratio and the equinox. Which is right guys?

    Please help
    Patrick
     
  2. pierrot

    pierrot Active Member 10 Years

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    Patrick

    it has to do with the ratio of red and infrared light. at the beginning of autumn in the northern hemisphere these ratios start to get out of kilter and so begin the process of turning the leaves and having them drop.

    pierrot
     
  3. LPN

    LPN Well-Known Member 10 Years

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    Not all decidious trees loose there leaves at the same time, or at the same rate. Some begin turning colors in late summer and drop early (Maple), and others like Alder hold their leaf into December with little change in color. A sudden early cold spell could trigger some leaf drop, but as peirrot pointed out it's mainly due to light level changes.
     
  4. Michael F

    Michael F Paragon of Plants Forums Moderator 10 Years

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    There are also lots of tropical trees which are dry-season deciduous; they lose their leaves in response to drought and then come back into leaf when the rain starts again
     

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