Red Fountain Grass (Pennisetum setaceum 'Rubrum'), or purple fountain grass, is a fast-growing, low-maintenance ornamental grass valued for its deep burgundy foliage and airy, pink-purple plumes that last from summer to frost. Thriving in full sun and well-drained soil, it grows 3–5 feet tall, acting as a dramatic, drought-tolerant accent plant, though it is only perennial in zones 8–11.