Recently Planted Too Deep

Incorrect planting procedures can contribute to deep structural roots. The problem can be compounded if the structural roots were already too deep in the root ball. Trees planted too deep may struggle to survive for years, or they may decline rapidly on sites with poor soil conditions. (photo by: T. Smiley)

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Probe the root ball to confirm that the structural roots are near the top of the root ball. Do not dig the planting hole deeper than the height of the root ball. In most situations, dig the hole a couple of inches shallower so that the root ball is a little above grade. This will allow for inevitable settling and flattening of the root ball. Compact any loose soil under the root ball for a firm base to support the root ball. Read more about correct planting techniques.

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The most difficult situation to deal with might be when a tree has been planted for only a short time before the deep roots are discovered. The course of action will depend on depth of the roots, condition of the tree, time elapsed since planting, and site conditions. There is no easy solution.

If the tree is still in good condition, not enough time has gone by for extensive regenerated roots to develop (a couple months of warm soil), and access to the site is still available for the necessary equipment and manpower, raising the root ball may be the best solution in the long run. In other situations, it will be a judgment call. If the site conditions are poor (especially drainage), even seasonally, there is even more urgency to replant.

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If the tree has been planted a full growing season, or more, disturbing the regenerated roots may stress the tree too much. When the tree is not replanted, a root collar excavation may be useful. In the end, be sure that the treatment will not do more harm than good.