 "Miscanthus" × "giganteus" is propagated by cutting the rhizomes (its below-ground stems) into small pieces, and then re-planting those pieces below ground.of miscanthus rhizomes, cut into pieces, can be used to plant 10–30 hectares of new miscanthus fields (multiplication factor 10–30).Rhizome propagation is a labor-intensive way of planting new crops, but only happens once during a crop's lifetime.