Perennial grass | Airy purple-pink seed heads | Drought-tolerant, ornamental
Seed Treatment (Before Planting)
Step 1: Cold stratify seeds by placing them on a moist paper towel inside a labeled ziplock bag. Refrigerate at 4°C (39°F) for 30 days.
Step 2: After stratification, soak seeds in warm water for 12–24 hours to improve germination.
When to Sow
Indoors: Sow in March–May.
Outdoors: Sow in late autumn where winter temperatures drop below -1°C (30°F) for natural stratification. Scatter on bare soil and gently press seeds down. Do not cover — light aids germination.
Germination Details
Optimum temperature: 21–24°C (70–75°F)
Germination time: 28 days (after stratification)
Light requirement: Light aids germination. Do not cover seeds.
Use grow lights to maintain 12–16 hours of light per day.
How to Sow Indoors
Sow on the surface of moist, well-draining seed-starting mix. Mist to settle seeds. Do not cover. Provide steady warmth and light.
Humidity
Use a humidity dome or clear cover to maintain consistent moisture during germination. Open the dome briefly once per day to allow fresh air in and reduce mold risk. Remove the dome entirely once seedlings emerge.
Post-Germination Care & Growing Tips
Transplant after last frost into full sun.
Final spacing: 20–30 cm (8–12 in) apart.
Thrives in dry, poor soils. Cut back in late winter to promote spring growth. Attractive to pollinators and lightly self-sows.
Overwintering
Perennial in USDA zones 5–9
In colder climates, allow seed heads to dry for reseeding or cut back in fall.
Mature Height
30–60 cm (1–2 ft) with airy flower plumes