Hairawn muhly
Muhlenbergia capillaris · Poaceae
📷 Stickpen · Public domain
The gardener's calendar
Hairawn muhly is in full bloom: enjoy it, watch watering in hot weather and let spent flowers feed pollinators before pruning.
ID card
- Common name
- Pink muhly, Hairawn muhly
- Family
- Poaceae (Grasses)
- Type
- Ornamental perennial grass
- Mature height
- 80 to 120 cm
- Foliage
- Deciduous, fine and arching
- Flowering
- August to October, pale pink to purple spikes
- Hardiness
- Zones 6 to 10 (tolerates around -15°C)
- Origin
- United States (Southeast)
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
Muhlenbergia capillaris flowers in late summer in full sun, in poor and very well-drained soil.
The common mistake
Feeding it or growing it in rich soil causes it to become oversized, less airy, and to flower less.
The pro's trick
Prune in late winter (February-March): cut back to 15-20 cm from the ground to let new growth emerge clean.
Seasonal watch
In very humid autumn, watch for crown rot: plant on a raised spot and ensure perfect drainage.
Care
Sunlight
Plant your Muhlenbergia capillaris in full sun, receiving at least 6 hours of direct sunlight daily for optimal flowering and intense pink colors. In partial shade, the plant stays green and flowers less spectacularly. Avoid overly shaded locations that reduce vigor.
Watering
This grass is very tolerant of drought once established. Water regularly during the first year to encourage deep root development. During summer and dry periods, occasional watering is sufficient. In very arid climates, moderate water encourages more beautiful flowering.
Soil
Muhlenbergia capillaris prefers well-draining soil, even poor or slightly acidic soil. Heavy, wet soils promote root rot: improve drainage with sand or gravel if necessary. This plant tolerates calcareous soils and rocky terrain very well.
Pruning
Cut the plant back to 10-15 cm from the ground in late winter (February-March), before new growth begins, to encourage dense and balanced new growth. Clean out dead stems and dry leaves. After flowering, you can cut back faded spikes for aesthetics, but many prefer to leave them through winter.
Fertilizing
Muhlenbergia capillaris requires only minimal feeding. A balanced compost or fertilizer in spring is more than sufficient. Avoid excessive nitrogen, which would promote lush foliage at the expense of flowering and weaken the plant's structure.
Diseases and pests
This grass is very hardy and rarely affected by diseases. Watch for root rot in case of excessive moisture or poorly draining soils: this is the main risk. No major pests generally affect it.
Did you know?
Muhlenbergia capillaris owes its common name 'Hairawn muhly' to the remarkable fineness of its flowering spikes, which form a pink-lilac cloud as delicate as wind-tousled hair. This grass has become essential in modern Mediterranean gardens and dry permaculture thanks to its exceptional ability to flower abundantly despite drought, without intensive watering.
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
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Tips generated and checked by Viridia — adapt them to your local climate.