14-28 days. Cenchrus purpureus. Open-pollinated. Perennial. Elephant Grass. The plant produces good yields of 10 to 15 ft tall giant bamboo canes. It is a popular grass variety prized for its fast-growing characteristics, height, and thickness. It is the World’s Tallest Grass! Commonly used for privacy hedges and windbreaks due to its thick root system and dense foliage. Grow it as a privacy barrier, ornamental landscaping, animal forage, windbreaking barrier, and erosion control. Plants should be spaced several feet apart to allow for mature spread, as each clump can expand significantly over time. Proper spacing improves airflow and helps maintain strong, upright growth. Elephant grass is a warm-season grower, meaning it will die back or go dormant in colder temperatures and regrow when conditions warm. Also known as Napier Grass and Uganda Grass. Excellent choice for home gardens. United States Department of Agriculture, PI 300086. A rare variety from South Africa.