> >That wouldn't be logical. In the fall when a tree begins to drop leaves
> is
> when they stop actively producing sap. Then the trees go dormant during
> the
> winter.
Correct. In the winter the tree maintains a very little sap and that is
thickened with sugar as an antifreeze. It is when the tree is expanding the
leaves that it wicks up a really lot of water and the wood becomes sappy.