What’s the Reason Behind Painting Trees White?
The white paint seen on tree trunks is a protective measure, not a decorative one. It serves a specific and important purpose for the tree’s health.
This practice is primarily used to prevent a condition known as sunscald. This occurs during winter when extreme temperature fluctuations damage the bark.
On a sunny winter day, the sun warms the tree’s bark, causing it to expand. When temperatures plummet at night, the bark contracts rapidly. This repeated stress can lead to cracking and splitting.
The white paint acts as a natural sunscreen. By reflecting sunlight, it keeps the trunk cooler during the day, minimizing the expansion and contraction that causes damage.
To apply this protection, tree caretakers use a diluted, water-based latex paint. A common mixture is one gallon of paint to one gallon of water.
This solution is then brushed or sprayed onto the trunk to create an even, protective coat. This simple application needs to be done only once a year to be effective.
Therefore, a white-painted trunk is a sign of care. It is a simple, yet highly effective, method to help trees remain healthy and withstand the challenges of winter.
