What are some good grass varieties for this area? I'm having a problem with the grass in my yard.  Part of it dries out and dies in summer if it's not watered every day, and part of it is in a drainage basin and dies because it's shaded all the time and can't tolerate very wet soils (it's not standing water, just wet soil).

Got any tips on the grass varieties to plan in these two parts of my yard?  Also, is now a good time to plant grass or should I wait until March or so?