You might have noticed that orange dots on trees often indicate that the tree is going to be cut down. Similarly, purple markings often mean “no trespassing” or that the tree is on private property. But the white paint serves an entirely different purpose. It is applied to trees during winter to help prevent a condition known as sunscald.
During winter, trees face extreme fluctuations in temperatures. During the day, the sun can heat up the tree’s bark, causing it to expand. But as night falls, the temperature drops drastically, leading to the bark contracting and cooling down rapidly. These rapid temperature changes can cause the bark to split, leading to significant damage to the tree’s trunk.
That’s where the white paint comes in handy. The light color of the paint helps to reflect sunlight away from the tree’s trunk, preventing it from overheating during the day. This, in turn, minimizes the risk of cracks and splits due to extreme temperature changes. Think of it as a natural sunscreen for trees, protecting their delicate bark from the harsh winter elements.
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