I guess you intend to seed your lawn, not buy sod. The dwarf fescue in my opinion is the only way to go in my climate. It gets along on half the water of the mixes. If you are doing your own irrigation system, be sure your sprinklers will water all the way from head to head to get even coverage. The number of sprinklers per zone will depend on your flow pressure. How many sprinklers can run at once without dropping the pressure? You need to find this out before designing your system. Al

another lawn question, anyone know how long after you put sod down can you walk on it? thanks

I try not to walk on it until it needs to be mowed. Walking on newly layed sod disturbs the roots which are getting established in your native soil and slows it down. Al

thanks Al