Improper planting depth
When planting, look for the root flare, and plant the ball with the root flare level with the ground. The kousa dogwood below declined over a period of several years before it died.
Symptoms associated with planting too deep include wilting, stunted growth, chlorosis, dieback, early fall color, scorch, and the development of adventitious roots. Planting too deep restricts the amount of water and oxygen to the fine root systems, lowering the trees vitality. Trees planted too deep are also more subject to canker development and wind throw.
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