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Misplacement of large maturing trees

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large trees in thin strip

The honeylocust planted between the walk and the wall are capable of growing to a large size. In order to thrive in this site, roots will have to grow under the wall and into the lawn behind the wall. The wall is likely to be displaced as the root flare develops and roots expand in diameter once they grow under the wall.

This often occurs because roots that grow under the wall typically do so just under the footing. Installation of a root barrier, or perhaps a 6-inch-deep layer of washed 3/4" to 1" gravel installed under the footing might prolong the life of the wall.