You live far enough north that you should use blended bluegrass seed (blend + two or more varieties of the same grass) if you are seeding a hill you may want to use amix of bluegrass varieties and PERENNIAL rye grass. Never use annual blue grass or annual rye grass - they are considered weeds in most lawns. If using a mix of bluegrass and rye, keep the amount of rye to 25% or less.
