This past winter we had a young man lose control of his car in icy roads and end up in the middle of our front yard. We have two very large ruts and are planning to replant the entire front yard this spring. Area is approximately 30' wide and 20' long. We like the look of Kentucky Bluegrass but are not sure about what to plant and when to do it in order to have the best success. 1. Is Kentucky Bluegrass suitable for out area (Zone 5a) and for a lawn that gets direct sun from sunrise to about 3 pm (east facing)? 2. When would be the best time to plant in the spring, since we often can have frost as late as mid-May? 3. What should we add to the soil after rototiling, if anything? 4. Would sod be a costly alternative? We do have a sod farm a few miles away with Kentucky Blueglass. Thanks for any help.