I live in Phoenix just North of Loch Raven Reservoir and want to know if it is too late to seed bare land.
Baltimore County Maryland
Not at all. We recommend seeding up until mid-October. The sooner the better, however, because the seed will germinate faster in warm soil. Also, you won't have to contend with falling leaves covering the seedlings or worry about leaf removal.
Here is a good overview of seeding that is well worth reading slowly as it touches on many aspects of seeding: https://extension.umd.edu/hgic/topics/lawn-renovation-and-overseeding