03/30/2026
Wound wood!!! Love it when you see a tree begin to heal itself.
Trees respond to injuries by reorganizing living cells around a wound, and this study shows that they don’t just seal the surface—they rebuild the vascular system that keeps them alive. When bark and cambium are damaged, nearby cells shift into a flexible, stem cell like mode and begin forming new secondary vascular tissue, which becomes new wood and inner bark. This helps reconnect the tree’s internal flow of water and sugars so it can keep growing. Because trees face constant stress from storms, insects, animals, and human activity, this ability to regenerate damaged tissue is essential for long-term health and survival.
For Tennessee’s urban forest, this matters every day. Street trees deal with lawnmowers, w**d trimmers, car doors, construction nicks, and storm damage. Understanding how trees rebuild their vascular system helps explain why proper pruning, avoiding trunk wounds, and protecting the root flare are so important. A tree that can seal cleanly and quickly is more likely to stay healthy, provide shade, cool neighborhoods, manage stormwater, and support wildlife. When we reduce unnecessary wounds and give trees the space and care they need, we’re helping their natural system do its job—strengthening the canopy that keeps Tennessee’s towns cooler, greener, and more resilient.
This message brought to you by the Tennessee Urban Forestry Council. For more information, visit https://tufc.com/. To become a member, click https://tufc.com/membership/.