Live crown ratio is one of those arborist terms that sounds technical but tells you a lot in plain English. It's simply the percentage of a tree's total height that's covered in living branches and foliage, and it's one of the clearest indicators of a tree's structural health.
A tree with a healthy live crown ratio, generally somewhere above a third of its total height, has enough foliage to produce the energy it needs and enough structural support along the trunk. When that ratio drops too low, often from over-pruning or years of decline, the tree becomes more prone to failure even if it still looks fine at a glance.
It's one of the first things our arborists evaluate on a structural assessment, because it tells us how much a tree can safely be pruned without pushing it into a riskier state.
Have you ever had a tree pruned so heavily that it seemed to change how the whole tree looked afterward?
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An authentic photo of a full tree canopy from ground level, ideally showing a clear visual of the ratio of living crown to overall trunk height.
Canva text suggestion: "How Much Crown Is Enough?" or "The Ratio That Tells Us a Tree's Real Health"