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steve22802

Clear vs. black plastic to increase decomposition rate?

steve22802
13 years ago

I'm making two new garden beds (4 x 25 feet each) this spring over top of existing lawn. I first laid down cardboard over the grass and now I'm piling on manure, leaves and various other organic materials. I'd like to have the turf killed and the amendments decomposed by mid May so that I can transplant into these beds after last frost. I'm thinking that it would be good to cover them with either clear or black plastic to trap the moisture, increase heat, block weed growth and to speed decomposition. Does anyone have opinions on whether clear or black plastic would be a better choice? I know that clear would generate more heat but it might also cause weeds to grow under the plastic. I doubt that it will be hot enough at this time of year for true soil solarization to take place so I'm afraid the weeds would thrive rather than be terminated.

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