Miscanthus sinensis 'Gracillimus' Maiden Grass Size: 2 to 7' high and 3 to 4' wide. Hardiness: Zones 5 to 9. Heat Zones: 9 to 1. Habit: Tuft-forming, warm-season grass forms massive clumps of tightly packed stems. The stems and leaves reach upward at first, then arch over, giving miscanthus the fountainlike appearance for which it is so famous. Culture: Full Sun to light shade.