@Irwhit, usually fescue will start growing when the soil temperatures are between 50° and 65° degrees F – these soil temperatures usually occur when the daytime air temperatures are between 60° and 75° degrees.
Since daytime air temperatures are related to seasonal treads, using phenology trends and averages, Long Islands usually experiences it’s first leaf date around 4/1 and first bloom around 5/1.
Keep in mind that spring is early this year; roughly 20 days early in some areas!