tree collar

Sat, 02 May 2026 15:31:47 +0000

Tree Collars: The Hidden Armor of Your Trees When it comes to tree care, many gardeners overlook one of the most critical—and often misunderstood—components: the tree collar. Despite its small size, the tree collar plays a vital role in protecting the health and longevity of your urban or landscape trees. Whether you're a homeowner, landscaper, or arborist, understanding the tree collar and its function can make a significant difference in your tree’s resilience. ### What Is a Tree Collar? The tree collar is the swollen, ring-shaped area at the base of a tree where the trunk flares out and meets the roots. Unlike the thicker bark of the trunk, the tree collar contains specialized cells known as cambium and secondary reconstructive tissue, which are essential for healing wounds and defending against disease.