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Descending or plunging roots

Large roots plunge, descend or dive down into the root ball behind the outer edge of the root ball often as a result of growing in a small container. These should be cut by the grower each time the tree is shifted to a larger container. This is considered a root defect because trees with this form are less stable than trees with some large roots that remain close to the surface.

root defect: plunging roots