How do trees know it's fall?

Beverly Erlebacher bae at
Mon Nov 2 12:18:18 EST 1998

In article <VA.0000000c.0018d7c0 at rogersbox>,
rgw  <rgw at> wrote:
>In article <fmP_1.15906$_e3.2511972 at>,  wrote:
>> The process by which deciduous trees lose their leaves is mainly due to the
>> reduction in daylight
>The length of it, that is. The shortening of the days acts as the trigger.

Trees under stress (e.g. drought) will often start earlier than others.

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