Bluestem
Andropogon gayanus · Poaceae
The gardener's calendar
Ideal time to plant bluestem: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Deciduous to semi-evergreen depending on climate
- Flowering
- Autumn (September to November)
- Mature size
- 1.5 to 2.5 m in height
- Growth
- Rapid under favorable conditions
- Hardiness
- Moderate (tropical to subtropical zones)
- Origin
- West and Central Africa
- Soil type
- Well-drained, tolerant of poor soils
Care
Watering
Water regularly during active growth phases, especially in the dry season, to keep the soil moist but not waterlogged. Once established, this grass shows good drought tolerance. Reduce watering in winter or during dormancy.
Light Exposure
Plant Andropogon gayanus in full sun, with a minimum of 6 to 8 hours of direct sunlight daily. This grass loves intense light to develop dense, vigorous foliage. It tolerates partial shade but with less dynamic growth.
Pruning and Cutting
Perform hard cutting in spring (late February to April) before growth resumes, cutting back to 10-15 cm from the ground. You can also do partial mowing in summer to control height and encourage a more compact form. Remove dead or damaged stems as needed.
Fertilizing
Apply balanced fertilizer in spring to boost growth. This grass is not demanding: moderate application is more than sufficient. In naturally rich soils, no additional feeding is necessary.
Soil and Drainage
Andropogon gayanus prefers well-drained soil but remains very tolerant of poor, sandy, or laterite soils. Avoid prolonged waterlogging which could promote root rot. Light mulching at the start of the season helps retain moisture.
Diseases and Pests
This grass is generally little prone to diseases. Watch for excess moisture which could lead to fungal rot. Ensure good air circulation and avoid excessive foliage watering.
Did you know?
Andropogon gayanus, known as "gamba grass" or "Guinea grass," is widely used in Africa as a high-quality pasture and for hay production. It plays a major ecological role in tropical and semi-arid savannas and was introduced to Australia where it became an invasive species, profoundly altering local ecosystems and fire regimes.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
Add this plant to my garden →Plants from the same family
- Tufted hair grassDeschampsia cespitosa
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- Purple moor-grassMolinia caerulea
- Reed canary-grassPhalaris arundinacea
- Common quaking grassBriza media
- Creeping soft-grassHolcus mollis
Tips generated and checked by Viridia — adapt them to your local climate.