Star-of-Bethlehem (Ornithogalum umbellatum)

Star-of-Bethlehem

Ornithogalum umbellatum

Delicate star-shaped blooms glow like scattered stardust in spring. Bulbous perennial flowering plant; common name: grass lily.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; thrives in bright, direct sunlight during cool spring months and tolerates light shade in warmer climates
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Watering Water regularly during active spring growth; reduce watering after flowering when foliage begins to yellow and die back
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Temperature Hardy to -15°C; enters dormancy during summer heat and winter cold to survive extreme temperatures
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Characteristics

  • Leaf: Narrow, linear, grass-like leaves with a central white stripe; emerge in early spring
  • Flower: Clustered umbels of 10–20 white, star-shaped blooms with green stripes on the reverse of petals
  • Bulb: Small, ovoid, white bulbs that spread via underground offsets
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Horticulturist's Insider Field Notes (No AI Fluff)

The Golden 'Finger Test' Rule

Never water on a strict calendar. Stick your index finger 2 inches into the soil. If it feels cool and damp, wait 2–3 days. If bone dry, water thoroughly until it drains from the bottom holes.

Empty the Saucer After 20 Minutes

The #1 houseplant killer is water sitting in the catch tray. Stagnant runoff water starves roots of oxygen and causes root rot.

Turn the Pot Every 2 Weeks

Houseplants naturally lean toward the nearest window light. Give the pot a quarter-turn biweekly to maintain balanced, symmetrical architecture.

Wipe the Dust Away

Dust on leaves acts like a heavy sunshade. Gently wipe broad foliage with a damp cloth monthly to maximize photosynthesis and air purification.

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Care Guide

Watering

Keep soil evenly moist during active spring growth; avoid overwatering to prevent bulb rot

Fertilization

Apply diluted balanced fertilizer once at the start of active growth. Use a low-nitrogen fertilizer to prioritize bulb and flower development over foliage growth

Eggshell powder top-dressing:Crush clean, fully dried eggshells into a fine powder; sprinkle lightly on the soil surface in early spring before new growth emerges
Pruning
  • Remove spent flower stalks immediately after blooming to redirect energy to bulb growth
  • Trim yellowing foliage once it has completely died back in late spring to maintain garden tidiness
  • Thin overcrowded bulbs every 2–3 years in early fall to improve airflow and reduce competition for nutrients
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Pet & Human Toxicity & Emergency Guide

⚠️ Toxic to Pets (Cats & Dogs)

Toxicity Warning: Veterinary toxicology registers Star-of-Bethlehem (Ornithogalum umbellatum) as possessing biochemical compounds (such as insoluble oxalates, alkaloids, or saponins) that pose ingestion hazards to felines and canines.

Feline Ingestion Risks (Cats)

Oral pain, hypersalivation (excessive drooling), pawing at mouth, swelling of tongue or lips, vocalization, and vomiting.

Canine Ingestion Risks (Dogs)

Oral mucosal irritation, gagging, retching, lack of appetite, lethargy, diarrhea, and difficulty swallowing.

Immediate Emergency First-Aid

Do NOT induce vomiting without veterinary instructions! Carefully remove remaining plant pieces, gently rinse mouth with cool water, and monitor breathing.

🚨 Pet Ingestion Emergency? Instant Plant & Toxicity Scan

Chewed leaf or stem? Open PlantFun App to scan the plant, immediately verify the botanical species, and view ASPCA toxicity severity ratings & vet first-aid advice.

Emergency Plant Scan
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Troubleshooting & Common Plant Problems

Quick diagnostic guide for common care issues affecting Star-of-Bethlehem (Ornithogalum umbellatum):

Yellowing Leaves

Most commonly caused by overwatering or poor drainage. Ensure topsoil dries out between waterings and check for root ventilation.

Brown or Crispy Leaf Tips

Low ambient humidity, hard tap water minerals, or direct midday sunburn. Increase humidity and use filtered water.

Drooping or Wilting Foliage

Indicates dehydration or root damage from prolonged waterlogging. Inspect soil moisture and root firmness.

Common Pests (Spider Mites, Aphids)

Dry indoor air encourages pests. Wipe leaves with a damp cloth and treat with insecticidal soap or neem oil.

🌿 Instant AI Plant Health Check

Take a photo of any leaf on PlantFun App to get instant diagnosis of diseases, pests, and custom care recovery steps.

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Propagation & Repotting Guide

  • Taking Cuttings: During active spring or summer growth, take a healthy 4–6 inch cutting just below a node using clean shears.
  • Rooting Medium: Place cuttings in fresh water or moist perlite mix in bright, indirect light; refresh water weekly.
  • Potting Up: Transplant into well-draining potting mix once roots reach 2 inches in length (typically 3–5 weeks).
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Seasonal Care Calendar

  • Spring & Summer (Active Growth): Water thoroughly as topsoil dries; apply diluted balanced fertilizer monthly; encourage steady growth.
  • Autumn (Transition): Gradually reduce watering frequency as daylight hours shorten; discontinue fertilization.
  • Winter (Dormancy): Water sparingly only when soil is mostly dry; protect from cold window drafts; keep in warm room.
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Frequently Asked Questions

How often should I water my Star-of-Bethlehem?

Water thoroughly when the top 1–2 inches of soil feel dry. In active growth (spring/summer), water every 1–2 weeks; reduce significantly in winter.

Where is the best indoor location for Star-of-Bethlehem?

Position in bright, filtered indirect light (e.g., near an east or south-facing window with sheer curtains). Avoid harsh direct midday sun.

Is Star-of-Bethlehem toxic to pets?

ASPCA: Toxic; ingestion can cause vomiting, diarrhea, lethargy, and abnormal heart rate

When should I repot my Star-of-Bethlehem?

Repot every 1–2 years in spring when roots outgrow the drainage holes or the soil depletes nutrients.

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Garden Uses & Culture

Culture: Associated with the biblical Star of Bethlehem; symbolizes hope, purity, and new beginnings

Usage: Ornamental garden plant; occasionally used as a cut flower for small floral arrangements

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