Sun Star (Ornithogalum dubium)

Sun Star

Ornithogalum dubium

Vibrant golden blooms shine like tiny suns, a cheerful spring accent. Bulbous flowering perennial; common name: Sun Star.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Requires full to partial sun; bright direct light encourages abundant blooms, with partial shade recommended during intense midday summer sun
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Watering Water thoroughly when the top 2 cm of soil dries out; avoid overwatering to prevent bulb rot
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Temperature Thrives in 15–22°C; tolerates brief drops to 10°C, but frost will damage foliage and bulbs
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Characteristics

  • Leaf: Linear, fleshy bright green basal leaves, up to 20 cm long, arching outward from the bulb
  • Flower: Dense terminal umbels of star-shaped golden-yellow blooms, 2–3 cm across, with subtle green central stripes on petals
  • Bulb: Small ovoid underground bulb with a papery brown tunic for moisture storage
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Care Guide

Watering

Keep soil evenly moist during active growth and blooming to support flower development

Fertilization

Apply half-strength balanced liquid fertilizer every 2 weeks to support blooming. Do not fertilize dormant bulbs to prevent nutrient burn

Eggshell powder top-dress:Crush fully dried eggshells into fine powder; sprinkle 1 teaspoon per pot around the base of the plant and water gently to work into the soil
Pruning
  • Snip spent flower stalks at the base after blooming to redirect energy to bulb growth
  • Trim yellowing foliage only after it has fully died back in late summer to avoid damaging dormant bulbs
  • Thin overcrowded bulbs every 2–3 years in early spring to improve airflow and encourage healthier blooms
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; contains cardiac glycosides that may cause vomiting, diarrhea, abdominal pain, irregular heartbeat, and lethargy

Humans: Contains cardiac glycosides; ingestion causes mild gastrointestinal upset, and sap may irritate sensitive skin

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Garden Uses & Culture

Culture: Symbolizes cheerfulness and spring renewal; commonly used in seasonal floral arrangements

Usage: Ornamental garden plant, cut flower for bouquets, indoor container houseplant