Q: A root was cut on my mature Zelkova tree. Is it going to die? What can I do to the exposed wood on the roots?
A: Many roots lie just below the surface, so cutting roots under a tree for any reason can severely damage it. The extent of the damage really depends on how close to the tree the root was cut and if it was the only major root cut. If it was the only root cut, it is likely that the tree will be fine. You might want to remove any jagged cuts or loose bark. Watering the tree to get it through the next summer should help to provide enough energy to replace one missing root. Keep an eye on the tree. If it starts to wilt when other trees look normal, it might need extra water. The tree should be fully recovered by this time next year.
Q: The leaves on the rhododendrons that were planted in my yard last spring fold up tightly when it gets really cold. Is this folding harmful or just a lack of water? Are they going to die?
A: On the contrary, this is a natural phenomenon that occurs with many rhododendrons when the weather is cold and below freezing. The curling or folding of the leaves reduces the exposed leaf surface and conserves moisture. The leaves will return to normal when the weather warms up, and there will be no harm to the plant.
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