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I want to plant some seeds soon and have a load of creeping charlie in my garden beds. If I throw down a tarp, about how long would it take for the weeds to be completely killed? Would laying down landscape (weed) fabric temporarily work as quickly?

Or is there a better strategy that doesn't involve attempting to pull them all by hand?

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It should not take long. It depends on temperature. If the temperature is in the 80's, it takes a week to 10 days to thoroughly do the job.

Use black plastic. It absorbs heat and cooks and kills the weeds and their seeds underneath.

  • Have you done this before? General guidelines would be great--say it's 70 degrees and sunny. Maybe I'll unroll a bunch of garbage bags. – glenviewjeff Apr 28 '13 at 2:05
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    Yes. If the temperature is in the 80's, it takes a week to 10 days to thoroughly do the job. – ncmathsadist Apr 28 '13 at 12:14
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I've used flattened cardboard boxes layered and weighed down by bricks before. It takes 3 wks to 2 months to kill everything underneath. At the end, cardboard has black and white mold on bottom so you can throw it away or layer mulch on top and let it naturally erode.

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