Giant-reed

Giant reed (Arundo donax) is an extremely vigorous, fast-growing grass that can reach over 20 feet tall and spreads aggressively via rhizomes, so it requires strong containment measures or regular removal of offshoots. Plant in full sun in any moist, well-drained soil and water deeply until established. Be aware that it is considered invasive in many regions outside its native range and should be managed carefully.