Island creation - Knowledgebase Question

Oxford, AL (Zone 8A)
Avatar for phsteed
Question by phsteed
April 29, 2007
We are creating a new island in our back yard in an area of tough clay soil. We plan to place good soil to a depth of 12 inches on the present surface so as to provide suitable rooting/growing medium for our plants. Here is the problem: There are two precious Dogwood trees within the proposed island boundry. Can we place 12 inches of soil around the Dogwoods without doing them harm or should we maintain the present level of ground at their base?

Answer from NGA
April 29, 2007

I am sorry for this delayed reply to your gardening question. The spring rush has brought a deluge of questions and we are working hard to catch up!

Adding that much soil will be deadly to those trees. I am not sure there is a solution as even if you leave a fairly large area around them uncovered it will be stressful due to the area that is covered. They would need at least an area extending 10 feet out in all direction around them to be left uncovered.

Thanks for the question. Best wishes for a wonderful gardening season. Please stop in again soon!

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