Weed Prevention - Knowledgebase Question

Avatar for LMCAA
Question by LMCAA
March 28, 2001
Last year we purchased some of the black netting to help prevent weeds from coming thru the garden bed. We put down a layer of the netting, then mulch. I am wondering if this material will hurt the soil underneath the netting. It looks a bit like plastic, but is suppose to have holes in it to allow sunlight and water to penetrate, but prevent weeds from coming up.

Answer from NGA
March 28, 2001
As long as the material is permeable by air and water it should not cause direct harm to the soil. You may find however that as the surface layer of mulch rots down and forms a nice layer of humus on top of the fabric that the weed seeds germinate like crazy there. The fabric also limits the ability of the organic matter to reach the soil where it would benefit it. Over time you may want to pull back the fabric periodically and allow the rotted mulch to replenish the soil below.

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