Why Are Some Trees Painted White?
Those white bands on tree trunks are a careful act of protection, not a random aesthetic choice.
In winter, sunlight can heat one side of a tree’s bark,
then freezing night temperatures slam it back down.
This sudden expansion and contraction can split the bark open,
a condition called sunscald, leaving the tree vulnerable to disease,
decay, and long-term weakness.
Painting trunks white with diluted water-based latex paint helps reflect the sun’s rays,
keeping temperatures more stable and reducing this stress.
Applied once a year, usually with a brush or sprayer,
the thin white layer becomes a kind of seasonal armor.
It won’t save a tree from every threat, but it quietly prevents a common,
painful injury most of us never see.
So when you pass a row of trees wearing white in the cold months,
you’re looking at deliberate care: a small human intervention that
lets them face another winter and leaf out strong in spring.
