Flower Bed Around Base of Large Tree - Knowledgebase Question

Lancaster, TX
Avatar for ytandco
Question by ytandco
July 7, 1999
We want to plant a raised bed around a very large established tree. I have always heard that you can't pile dirt up around the trunk of a tree because it will kill it. Is this true and why? If we keep the bed raised but away from the trunk of the tree by a few inches will it still kill it?

Answer from NGA
July 7, 1999
Soil piled against the trunk can damage the tree by inducing decay in the lower trunk area. While the exterior tissues of the tree's roots are suited to being in contact with moist soil, trunk tissues are not.

Keep soil back away from the trunk. I suggest you give it about a foot of space to allow the trunk and its flared base room to breathe before starting the pile of soil for your planting bed.

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