Weed Control Using Landscape Fabrics

Writen by Bill Prudehome

Choosing the correct landscape fabric for weed control can be a very time consuming and frustrating exercise, as anyone who has gone through the process will gladly confirm. The manufacturers of landscaping fabrics produce and publish specifications; however the major problem is that their largest market is construction. Hence, they produce their specifications with the construction market in mind. If you have an unlimited amount of time and a lot of patients you can read through all of the manufacturers' specifications and try to garner some useful comparison information that will be useful in weed control and prevention.

When choosing a fabric for landscaping, there are three primary areas to consider:

1. The strength of the fabric is relative to the amount of air and water flow that will permeate through the fabric. Stronger materials allow less water and air to flow through the fabric. When choosing a fabric for your landscaping project you should identify one that has adequate strength for the application, any additional strength is counter productive and will cost you more.
2. You want to choose a fabric that has a consistent and even dispersal of fibers. The mesh size should be as small as possible in order to prevent weedy grasses from penetrating the fabric's openings. Weeds and grasses do not grow through the fabric they are attracted by any minute quantities of light that may penetrate the openings between the weave in the fabric or in separations that have occurred between pieces of fabric. Weeds can germinate in the smallest amount of soil and hence will grow on top of the fabric, if there are the tiniest amounts of earth, sending fine root hairs through the fabrics weave on a quest for nutrients and moisture from the soil. To prevent weed and grass growth appearing through the fiber's weave consider the use of a spunbonded fabric because of its microscopic mesh size.
3. There is a fine balancing act with respect to the porosity of the landscaping fabric. You want the mesh to be fine enough to prevent weed and grass growth but you want the holes in the mesh to be large enough to provide sufficient water and air to enter the soil. The fabric's ability to breath; to allow oxygen and moisture to pass through the fabric and aerate and water the soil so that the plants will be hardy and not starved of essential life sustaining material. It is this feature that separates the average landscaping fabrics from the superior ones. This is why the use of plastic sheeting as a weed deterrent does not work. It may prevent the growth of weeds and grasses but it also prevents air and water from entering the soil. A fabric that does not have good permeability will create the problems of water run off which will wash away any coverings such as bark or mulch that may be lying on the surface of the fabric.

For additional information on landscaping your home or other renovation projects, visit Renovation Headquarters.