GENERAL INFORMATION
Scientific Name: Centaurea ragusina
CommonName: Snowflake Dusty Miller
Hardiness Zone: 6b - 9b
Blooming Season: Spring
Plant Habit: Mounded
Characteristics: Drought Tolerant, Rabbit Resistant, Colorful/Attractive Foliage, Low Maintenance
Water: Light
Fertilizer: None or when needed only
Spacing: 13 - 16" (33 - 41cm)
Height: 8 - 11" (20 - 28cm)
Width: 11 - 14" (28 - 36cm)
Exposure: Sun
PROPAGATION
Media EC/pH: EC 0.75-0.80 mmhos/pH 5.8-6.2
Soil Temperature: 70-72°F (21-22°C)
Rooting Hormone: 500 ppm IBA
Mist: Low to moderate
Fertilization: 50-75 ppm N starting day 7
Pinching: Pinch once, prior to transplant.
Transplanting: 35-42 days after sticking
FINISHING
Media pH: 5.8-6.2
Temperature: Nights: 56 to 64°F (13 to 18°C) Days: 65 to 76°F (18 to 24°C)
Light Level (fc): 5,000 to 8,000
Vernalization: No
Watering: Allow media to dry moderately between watering.
Fertilization: Use a balanced fertilizer at a rate of 150 to 175 ppm N.
Pinch After Transplant: Typically not required
Pests and Fungal Diseases: Thrips and pythium can be issues. Use well-drained media.
CROP SCHEDULING
1–qt. (10–cm) pot, 1 plant per pot: Not recommended
1–gal. (15–cm) pot, 1 plant per pot: Rooted: 6-8 wks
2 to 3–gal. (25 to 30–cm) pot, 3 plants per pot: 10-12 wks
Bloom Months: June to July