We just planted some Hardy Pampas Grass (less then a week ago) and the plants have quite a bit of dead grass among the green. Should we cut down the dead grass? I am afraid we were too hasty in buying our plants and may have ended up with not so healthy ones. We have been watering them every day. They don't look any worse then when we purchased them but...I have never been very good with plants and I am just not sure what to do. We bought the plants at Lowes so I doubt there is anyone there who really knows alot about the plants they sell. Any suggestions would be appreciated.