1. all shade, poor draining backyard

    my backyard gets very little sun in the summer when trees have all their leaves. my lot slops--left to right and we have put 2 collector boxes at the top of the slope. the boxes drain into a dry easment behind the house.

    any grass we plant, including the professionally installed sod last fall, washes away. what can we do? what can we plant that will survive shade, poor drainage and a dog?

    please help, I give up!!!