Source: The Castaic, CA weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.
Plant fescues when fall temperature reach about 75 F. The next best time to plant fescue seeds is when rising temperatures in spring reach 60 F. Summer isn't a good time to plant fescue lawns, because fescue grass tends to go dormant during periods of high temperature.
Step 1. Mow over your existing lawn before attempting to plant fescue grass. Cut your lawn as short as possible using a lawn mower and remove any grass clippings from your lawn. Step 2. Add bagged topsoil to uneven patches or dips in your lawn to create an even grade. When the fescue grows in, your lawn will be smooth and flat.