Answer: My solution is to create a watering basin by mounding up several inches of soil in a circle around the trunk, about 12" away from the trunk and placing bark or rocks in the basin to within an inch of the trunk. It's a convenient way to water and the thickness of the bark or rocks keeps weeds from sprouting. You don't need to actually put anything in the basin - just rake or hoe out any little weeds that try to grow there. Because it is bare soil to begin with, weeds are easy to see and to pull before they get a strong foothold.
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