Why Are Some Trees Painted White? A Winter Secret, Revealed

But white?
White is different.
White is not for humans.
It’s for the tree.

In winter, when the sun hangs low and bright against a pale sky, something quiet and dangerous can happen: sunscald.

Here’s how it unfolds:
During the day, the sun’s rays warm the dark bark, causing it to expand—just slightly, just enough.
Then night falls. The temperature plummets.
The bark cools—too quickly. It contracts.
And in that sudden shift, it can split. Crack. Peel away.

These wounds may seem small, but they’re invitations—to pests, to disease, to decay.
A tree, in its stillness, is fighting to hold itself together.