Purple Millet
Cenchrus americanus
An ornamental grass featuring broad, corn-like green leaves and striking, upright, dark purple to black fuzzy cylindrical seed spikes.
- Light
- Full sun, requiring at least 6 to 8 hours of direct sunlight daily.
- Water
- Moderate water needs; keep the soil evenly moist but not waterlogged. Established plants have moderate drought tolerance.
- Growth
- An upright, clump-forming annual grass growing to a mature height of 3 to 5 feet and a spread of 2 to 3 feet with a fast growth rate.
Care instructions
Provide full sun exposure, fertile and well-draining soil, and consistent moisture with regular watering during dry spells. Fertilize monthly with a balanced liquid fertilizer during the active growing season.
Growing details
Sunlight
Full sun, requiring at least 6 to 8 hours of direct sunlight daily.
Watering
Moderate water needs; keep the soil evenly moist but not waterlogged. Established plants have moderate drought tolerance.
Soil
Prefers rich, loamy, well-draining soil with a neutral pH range between 6.0 and 7.5.
Hardiness zone
USDA zones 2 to 11, typically grown as a warm-season annual in cooler temperate regions.
Growth habit
An upright, clump-forming annual grass growing to a mature height of 3 to 5 feet and a spread of 2 to 3 feet with a fast growth rate.
Bloom season
Non-flowering in the traditional sense, but produces showy dark purple to black catkin-like seed heads from mid-summer until frost.
Propagation
Propagated easily by seeds sown directly in the garden after the last spring frost when soil temperatures warm up.
Common pests & issues
Generally trouble-free, but may occasionally experience root rot in poorly draining soils or be bothered by aphids and rust.
Similar species
Purple Fountain Grass (Pennisetum setaceum), which has finer, more arching foliage and softer, pendulous pinkish-purple plumes compared to the stiff, upright spikes of Purple Millet.