Top Questions About Columnar Oak Trees

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Questions About Columnar Oak Trees

Asked by
Sallee on
May 19, 2019
Thpmpsons Station. TN 37179

Q. Columnar Oaks top branches are bending away from tne trunk. Are they growing too fast? Should we prune them?

Have 3 trees. One is upright. Other two are collapsing at the top and getting tangled.

Answered by
BushDoctor on
May 20, 2019
Certified Expert
A.

It would be hard to say without photos. The problem is likely on the opposite end of growing too fast, though. Usually fungal infections are the cause of trees collapsing, but it can have other factors, such as too much shade, or even down to a lack of silica in the soil.

Please provide some photos, and I will be more than happy to help diagnose your tree.

In the meantime, this article will help you with the care of these trees: https://www.gardeningknowhow.com/ornamental/trees/oak/columnar-oak-trees.htm

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Asked by
Noreen Gibbs on
October 26, 2019
Ottawa, Ontario, Canada zone 4 or 5

Q. Do you know if columnar oaks have an invasive root system?

We wish to plant a columnar oak, as my husband loves them. The location is about 16 feet from our house. Thank you for any information regarding the root system. Noreen Gibbs

Answered by
BushDoctor on
October 28, 2019
Certified Expert
A.

They aren't known for it, but all trees have the potential to harm structures if planted close enough.

16 feet should suffice for foundations and structures. Since these trees aren't expansive above ground, you don't need to worry much about branch drop that far out. As long as you aren't planting close to a septic system or sewer lines, it shouldn't be an issue.

Here is an article that will give you more information on caring for the tree: https://www.gardeningknowhow.com/ornamental/trees/oak/columnar-oak-trees.htm

Here is an article that will give you examples of trees to avoid near structures and lines: https://www.gardeningknowhow.com/ornamental/trees/tgen/trees-with-invasive-roots.htm

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