Landscape fabric has its pros and cons. This article covered the weed barrier's many benefits, but let's take a look at some of its drawbacks:  --Landscape fabric is not a 100% effective weed control solution.  --The fabric can clog over time, which means water and air won't access the soil or plant roots.  --Landscape fabric can harm plant health if the plant's roots grow into the material in search of oxygen.  --It can suffocate earthworms, which damages soil health as a result. --Landscape fabric prevents organic mulch, such as wood chips, from improving the soil. - Wind can blow weed seeds from neighboring lawns and gardens onto the layer of mulch above the fabric. These new weeds can be challenging to remove because their roots often intertwine with the weed barrier.