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Pacific Northwest Gardening: Want to re-use then next year..., 1 by mstish

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Subject: Want to re-use then next year...

Forum: Pacific Northwest Gardening

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mstish wrote:
I had clematis in these barrels and continually had to spray for powdery mildew. Finally I moved the clems to the ground (they needed more root space anyway). I would like to re-use these barrels and the dirt.
What can I rinse through the dirt and what can I clean the inside of the barrels with that will kill the powdery mildew?