PlantFun
Plant Needs
Sunlight
Requires full sun to partial shade; at least 6 hours of direct sunlight daily to support optimal flower production
Watering
Water deeply when the top 2–3 cm of soil is dry; avoid overwatering to prevent bulb rot
Temperature
Hardy to -15°C; tolerates mild summer heat but prefers cool to temperate growing conditions
Characteristics
- Leaf: Narrow, linear, grass-like green leaves that die back before flowering
- Flower: Dense spherical umbels of star-shaped, bright azure-blue flowers
- Bulb: Small, papery-skinned underground bulb for overwintering
Care Guide
Watering
Keep soil moderately moist during active growth and flowering periods
Fertilization
Apply balanced slow-release fertilizer at bulb planting time. Avoid high-nitrogen fertilizers which can prioritize leaf growth over flower development
Eggshell powder topdressing：Crush dried eggshells into fine powder; sprinkle lightly over soil surface in early spring to provide slow-release calcium without risk of burning rootsPruning
- Remove spent flower heads after blooming to prevent unwanted self-seeding (optional)
- Cut back yellowed foliage to ground level in late summer after it has fully died back
- Divide overcrowded bulb clumps every 3–4 years in autumn to maintain plant vigor
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Toxic; contains thiosulphates that cause hemolytic anemia in cats
Humans: Ingestion of large amounts may cause mild gastrointestinal upset including nausea and abdominal pain
Garden Uses & Culture
Culture: Symbolizes patience and delicate elegance in ornamental gardening contexts
Usage: Ornamental garden plant; cut flower for fresh floral arrangements
