What is Root Collar?

Many of the problems seen in the landscape originate in the root/root crown area of the tree. The root crown is the junction between trunk and roots at the soil surface. This area can be identified by looking for a flare in the trunk of the tree at ground level where the trunk transitions into roots. These roots should extend laterally into the soil to support and feed the tree.

Unfortunately many nursery grown and transplanted trees have been improperly cared for or improperly planted. The most significant problem is a tree planted too deeply in the soil. When the root crown is buried in soil and mulch the tree must respond to survive. The tree may reproduce roots along the trunk or grow upward in the soil seeking proper oxygen levels.

These roots begin to circle around the trunk causing girdling and strangulation problems. The tree then begins to decline. In addition, the trunk may begin to decay because it is not capable of living in the moist, closed soil conditions.

Proper planting is the most important aspect of good landscape care. When a tree is planted identify the root crown and be certain this structure is at or slightly above the soil grade and being careful not to burry the plant with soil or mulch. If your tree is established the root crown needs to be excavated to expose the crown and to inspect for damage and girdling roots. Our company uses an Air Spade to perform root crown excavations. An Air Spade is a tool which uses compressed air to force the soil from the roots while not damaging them. The video shows the Air Spade in action and the results.

We are seeing what we characterize as an epidemic of poorly planted, root bound trees in Virginia and believe that all trees should be inspected and excavated. We recommend you contacting us soon to schedule an appointment to have your trees checked: (540) 337-4588