PlantFun
Plant Needs
Sunlight
Requires full sun for optimal flower production; tolerates partial shade but may produce smaller, less dense blooms
Watering
Water deeply when the top 5 cm of soil dries out; avoid overwatering to prevent bulb rot
Temperature
Extremely cold hardy, surviving temperatures as low as -30°C; dormant in winter to conserve bulb energy
Characteristics
- Leaf: Linear, blue-green basal grass-like leaves that die back before flowering
- Flower: Dense spherical umbels up to 15 cm wide, composed of tiny star-shaped purple florets
- Bulb: Underground globular bulb covered in papery brown tunics
Care Guide
Watering
Keep soil evenly moist during active foliage and flower stalk growth
Fertilization
Apply balanced granular fertilizer at bulb emergence. Avoid high-nitrogen fertilizers that may promote foliage over flower growth
Eggshell powder topdressing：Sprinkle finely crushed, fully dried eggshells around the base of plants in early spring; avoid direct contact with foliage to prevent burningPruning
- Remove spent flower heads to prevent unwanted self-seeding (optional, if naturalization is not desired)
- Cut back yellowed, dead foliage to ground level in late summer after it has fully died back
- Divide overcrowded bulb clumps every 3–4 years in autumn to promote healthy growth and flowering
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Toxic due to thiosulphate compounds; may cause red blood cell damage with significant ingestion
Humans: Ingestion of large amounts of bulbs may cause mild gastrointestinal upset including nausea and diarrhea
Garden Uses & Culture
Culture: Symbolizes unity and community due to its tightly clustered florets; popular in cottage garden and pollinator-focused landscapes
Usage: Ornamental border plant, cut flower for floral arrangements, and pollinator attractant for bees and butterflies
