Weeds are not only an eye sore but also are a nuisance in several other ways such as attracting insects, robbing your lawn from nutrients and water, and can lower your property value if trying to sell.  For weed prevention a pre-emergent should be applied in early spring prior to the soil temperature reaching 50 degrees Fahrenheit for five consecutive days (mid to end of Febuary).  We recommend hiring a professional that can assist you with all your lawn care needs in a safe and environmentally friendly manor.  You can find more information at www.maltalandscape.com.