Tree Research

Blog Archives

Information from scholarly studies at the Bartlett Tree Research Laboratory.

What Causes Girdling Roots?

Incorrect planting can lead to the production of girdling roots below the soil grade. Girdling roots are lateral roots that emerge at or slightly below the soil surface and cut into at least one side of the main trunk. A

Posted in Tree Advice, Tree Research, Tree Safety

The Science Behind Fall Foliage

Why do leaves change color in the fall? A good start to answering this question is to look at each of the pigments involved.

Posted in Tree Research

Boosting Tree Defense Systems

Natural defense systems enable trees to ‘fight back’ when they’re under attack from pests or disease or facing stress from environmental conditions like drought. Even with these defense systems in place, trees will decline when conditions become too severe or

Posted in Pests and Diseases, Tree Research

New Beginnings

Here in the South, Mother Nature is busy showing off with spring in full swing. She is in high gear with blossoms and buds bursting and pollen beginning to take wind. It’s hard to imagine someone not being enthralled with

Posted in Tree Research

Unusual Growths on Trees

Unusual is one of the best way to describe galls on trees. These abnormal plant growths are found on leaves, twigs, and branches. They range in size from tiny lumps to large, complex protuberances. Galls may present as bumps on

Posted in Pests and Diseases, Tree Advice, Tree Research

Being a leader in the tree care industry means continually focusing on learning and innovation. Bartlett’s Tree Topics blog follows in that tradition by offering a place to receive advice on trees, tree pests, tree preservation, and more.

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