The moment a tree is trimmed, an amazing internal process kicks into gear. Think of it like a tree’s emergency response system. Let’s break down what happens step-by-step:

Callus Formation

The tree immediately begins to form wound wood, also known as callus, around the perimeter of the cut. This isn’t the same as scar tissue that forms on our skin; it’s a unique type of wood cells designed specifically for protection. The callus acts as a temporary barrier, preventing the entry of insects or decay-causing fungi.


Trees have a fascinating ability to seal off injured areas, a process called compartmentalization. Picture the tree building internal walls around the wound, isolating the damage. This prevents decay from spreading deeper into the tree’s heartwood, ensuring its strength and stability.

Energy Redistribution

With less foliage, your tree may temporarily channel its energy towards wound closure and internal repair, resulting in slightly slower growth. Don’t worry, this is a natural and necessary part of the healing process. The tree is prioritizing its long-term health over immediate growth spurts.

Adapting to Change

Losing branches changes the tree’s distribution of weight and its exposure to sunlight. Over time, the tree will adapt by redirecting growth hormones and resources, producing new shoots and branches to regain its balance and optimal canopy shape.