The white coating, usually a diluted latex paint, acts like a shield. It reflects sunlight instead of absorbing it, helping keep the bark at a more stable temperature throughout the day and night. By reducing those extreme swings, the tree is far less likely to suffer damage.
In a way, it works like sunscreen for trees—simple, inexpensive, and highly effective. Farmers, gardeners, and city planners use it to protect vulnerable trees during harsh seasons, giving them a better chance to grow strong and healthy.
So the next time you pass by a line of white-painted trunks, you’re not looking at something random or decorative. You’re seeing a small but powerful act of care—one that helps trees survive conditions they can’t defend themselves against.
