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.
You Can Let Your Fescue Lawn Go Dormant Well, the time of the year has arrived in the Mid-Atlantic gardening region where cool season lawns like fescue are doing their best to turn brown. The heat has arrived, the rains are becoming less frequentâ¦and the fescue is doing its best to rest. As a cool season grass, it thrives in the cooler temperatures from September through May.