This is the best part about silver grass: these plants are extremely low maintenance. The first year they should be watered if the ground dries out, like you would water your garden. We add grass fertilizer when planting. After they are established the second year they are drought resistant, requiring very little watering.
In the winter, after the second frost, they turn brown but stay standing for good wind and snow break.
We cut the grasses back in the early spring to about six inches, which allows a lot of room for new growth. This is not a necessary, however.