I just want to post a warning about fescue grass and pregnant mares. Depending upon what zones tall fescue is planted in, it can may become infected with endophyte and when this occurs, fescue should not be grazed by pregnant mares for 60-90 days before foaling. Endophyte infected fescue can result in prolonged gestation and difficult births, thickened placentas, infection, foundering and difficult rebreeding, little or no milk may be produced and colostrums levels may be decreased.
Now is the best time to plant for our area. If your daytime temps are in the 60-70 range than its a good time for you too.