Why Do Tree Trunks Turn White? The Real Reason Explained
You may have noticed trees with their lower trunks painted white and wondered why. It may look decorative, but it actually serves an important purpose.
The Main Reason: Protection from Sun Damage
The primary reason tree trunks are painted white is to protect them from sun damage, also known as sunscald.
During the day, sunlight heats the bark
At night, temperatures drop quickly
This sudden change can cause the bark to crack or split
The white color reflects sunlight, helping to keep the tree’s temperature more stable and preventing damage.
Protection from Temperature Changes
Trees, especially young ones, are sensitive to extreme weather. Painting the trunk helps:
Reduce stress from heat and cold
Prevent the bark from weakening
Protect the tree during both winter and hot seasons
Helps Deter Pests
Whitewashing can also help keep certain insects and small animals away from the bark, reducing the risk of damage.
Common for Young and Fruit Trees
This method is often used for:
Fruit trees
Young trees with thin bark
Trees that are more vulnerable to environmental stress
