Commented: grass i.d. pleaseI believe you're talking about miscanthus sacchariflorus.Very attractive in fall color.The downside is its aggresive spreading and may have to be be contained.
Commented: erianthus ravennae from seed?At some point you'll have to isolate each seedling. One plant will become many stalks with plumes. At maturity it'll be about 4 feet in diameter with a dead center. That's not to say you couldn't plan...