MIGHTY109 Plus Fescue Bluegrass (90/10) Seed Blend 5 LBS (Covers Up to 500 Square Feet)5 LBS MIGHTY109 Plus Fescue Bluegrass (90 10) Seed Blend. Same seed used in our famous MIGHTY109 Plus Fescue Bluegrass Blend Sod. Covers up to 500 Square Feet. 90% Fescue Blend, 10% Bluegrass Blend Our most popular sod, MIGHTY109 Plus Fescue Bluegrass Blend Sod, is a new generation of Fescue Bluegrass Blend of sod that provides a darker green color, finer texture and lower growth, while keeping the hardy nature and lower water needs of its original