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  • Centaurea ragusina Silver Swirl Bloom
  • Centaurea ragusina Silver Swirl Container
  • Centaurea ragusina Silver Swirl Landscape

Centaurea ragusina Silver Swirl

Scientific Name : Centaurea ragusina
Common Name : 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
General Information : Stunning silver-white leaves will brighten any space and attract the eye! Lovely mounding appearance. Gracefully wavy leaf edges add a wonderful texture.
Idea & Tips : Performs best in full sun in dry, well-drained soils. Easy to grow and drought tolerant once established.
Grower InformationAttract more attention to any display or landscape.
  • Plant has distinctive silvery white foliage with wavy leaf edges.
  • Ideal for combos and front-of-the-border plantings.
  • Offers better Winter hardiness than the competition.

Retailers Choice Award

Protection InformationEU PBRAF; PPAF
(Flowering Only License)
Breeder : Darwin Perennials
  • Propagation Guide
    • 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
      Low to moderate
      50-75 ppm N starting day 7
      Pinch once, prior to transplant.
      35-42 days after sticking
      Mist enough to rehydrate cuttings. Do not over-mist beyond Day 2 or 3. Saturated media will delay rooting. Remove from mist before completely rooted and dry media slightly to encourage rooting and better uniformity.
    • Media pH:
      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
      Allow media to dry moderately between watering.
      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.
    • 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

Download Culture Guide