Buttermilk: Substitute an equal amount of soymilk mixed with lemon juice. Allow the mixture to thicken 5 minutes before using. Or substitute an equal amount of vegan sour cream substitute diluted half and half with water. 1 cup buttermilk = 1 cup soymilk with 2 Tblsp lemon juice allowed to sit 5 minutes. 1 cup buttermilk = 1/2 cup vegan sour cream mixed with 1/2 cup water. Sour Cream: Use a vegan sour cream substitute.
Lay down aged cow manure as a top dressing over recently mowed grass. Use bagged commercial aged manure or buy from a reputable bulk dealer. Manure can be used to top dress grass once or twice a year, with the first application in the early spring and the second in the early fall.
Plant fescues when fall temperature reach about 75 F. The next best time to plant fescue seeds is when rising temperatures in spring reach 60 F. Summer isn't a good time to plant fescue lawns, because fescue grass tends to go dormant during periods of high temperature.