FD2B Talk Radio Insight of the Night: Mark Chisholm

May 9, 2013 -  By

Many of you may know that “girdling” may cause a tree to fail over time. Girdling occurs when a tree root wraps itself around the trunk of the tree, literally choking it to death. The typical cause of girdling, according to Mark Chisholm of Aspen Tree Expert Co., is too much organic material, such as topsoil and/or mulch, covering the root flair of the tree.

This can occur naturally, but in the suburban landscape it’s Green Industry professionals that often cause the problem. This is due to the homeowner’s addiction to mulch and our own annual spring process of over mulching, which creates what’s commonly referred to as mulch “volcanoes.”

Although improper planting techniques and “mulch madness” are part of the problem, the plants that you, the landscape contractor, purchase from growers and re-wholesalers are often already in distress. As Chisholm points out, the trees may be planted too low in the container or when they’re balled and burlapped.

Show: Why Should I Care About Tree Care
Guest: Mark Chisholm, Aspen Tree Expert Co., Freehold, N.J.
Date: May 1, 2013
To listen to the full show, CLICK HERE.FD2B Talk Radio

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About the Author:

Jody Shilan is a landscape design/build sales consultant, editor of and former executive director of the New Jersey Landscape Contractors Association. Reach him at 201-783-2844 or

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