Tree stands should be kept filled with water. A seal of dried sap will form over the stump in four to six hours if the water drops below the base of the tree. This seal will prevent the tree from absorbing water from the tree stand once it is refilled. If a seal forms, another fresh cut will be needed, Louden said. Tree sellers say a tree will absorb as much as a gallon of water or more in the first 24 hours and one or more quarts a day thereafter.
Ample water prevents the needles from drying and the boughs from drooping.
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