Pour distilled white vinegar on the weeds—enough to get them good and wet—but don’t hose it off. Let it stay there, and in a few days the weeds will be dead. Vinegar will also get rid of patio moss. Splash on a half-cup wherever you see green growing where it’s not supposed to. This is safe and effective for wood and slate patios. Reapply as needed, usually after a heavy rainstorm.
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