I have a patch about that size that I planted for the same purpose last spring. I don't remember what kind of seed, but it was just whatever the hardware store recommended -- I figured they'd have the right stuff for this town. They recommended the full sun variety even though I have partial shade. It grew fine watering daily for a month or two, then easing back, but I will say the difference between the shady half and the sunny half is dramatic. The sun is so intense up here. In the shade it loves to grow, in the sun it's a bit of a struggle. I ended up soaking that half every time it started to brown, maybe once a week.