How to Grow Star of Bethlehem
Wikimedia Commons
Star of Bethlehem
Ornithogalum umbellatum
flowerOrnithogalum is a genus of bulbous flowering plants known for their star-shaped white flowers arranged in delicate clusters. These spring-to-summer bloomers are prized for their elegant appearance and are commonly grown as ornamentals in gardens and containers. Most varieties are hardy perennials that naturalize well and require minimal maintenance once established.
Looking for a specific variety?
When should you plant Star of Bethlehem in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Star of Bethlehem timeline · Pittsburgh, PA (Zone 6b)
-
Plant Star of Bethlehem
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
First Star of Bethlehem blooms
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Star of Bethlehem dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Ornithogalum thrives in USDA zones 4-9, with some cold-hardy varieties extending to zone 3
Sign up free to see if Star of Bethlehem grows in your zone — and get a personalized planting timeline.
Get my Star of Bethlehem timeline →Growth Stages
Dormancy
June-August (varies by variety and climate)Bulbs are resting underground after flowering and foliage dies back. Leaves yellow and wither completely.
Reduce watering significantly; allow soil to remain mostly dry. Do not disturb bulbs during this period.
Sprouting
2-3 weeksNew green shoots emerge from the soil as temperatures cool in autumn or early spring (depending on variety).
Begin light watering when growth resumes. Ensure drainage is adequate to prevent rot.
Vegetative Growth
3-4 weeksLinear, strap-like foliage develops and elongates. Plants build energy reserves for flowering.
Water moderately during active growth. Avoid overhead watering to prevent fungal issues. Apply balanced fertilizer if desired.
Flowering
3-4 weeksTall flower stems emerge with delicate star-shaped flowers clustered in umbels, typically white with green or yellow stripes on the back of petals.
Keep soil consistently moist but not waterlogged. Deadhead spent flowers to encourage extended blooming if desired, though self-seeding is often welcome.
Seed Development & Ripening
2-3 weeksFlowers fade and seed pods develop. Foliage remains green but begins to yellow naturally. Some gardeners allow seeds to drop for naturalization.
Continue moderate watering until foliage completely dies back. Leave seed pods intact if naturalization is desired; remove for tidy appearance.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Ensure good drainage and airflow; discard infected bulbs; treat soil with miticide if infestation is severe
-
Plant bulbs deeply; remove and destroy infested bulbs immediately; apply mulch to deter adult flies
-
and
Remove debris where they hide; use copper tape or barriers; apply slug bait or encourage natural predators
-
Increase humidity; spray with neem oil or insecticidal soap; remove heavily infested leaves
Uses
Traditional Middle Eastern cooking
CulinarySome Ornithogalum species, particularly O. arabicum, have bulbs traditionally used in Middle Eastern cuisine, though modern culinary use is limited. [source]
Traditional herbal medicine
MedicinalVarious Ornithogalum species have been used in traditional medicine systems for treating wounds and skin conditions, though scientific evidence is limited. [source]
Cut flowers and floral arrangements
HouseholdStar of Bethlehem is excellent for fresh flower arrangements and bouquets, offering delicate, long-lasting blooms that complement other spring flowers. [source]
Garden naturalization and landscaping
CraftOrnithogalum bulbs naturalize well in lawns, woodland gardens, and borders, creating stunning spring displays with minimal intervention year after year. [source]
Pollinator support
WildlifeThe star-shaped flowers attract bees, butterflies, and other pollinators, making Ornithogalum a valuable addition to pollinator gardens. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Cut flowers when the first blooms open for longest vase life (typically 5-7 days). Cut in early morning with sharp, clean shears. Allow foliage to die back naturally after flowering to replenish bulbs. For seed collection, allow seed pods to dry on the plant before harvesting.
Fun Facts
- 🌱 The common name 'Star of Bethlehem' is believed to reference the biblical star that guided the Magi, due to the flower's star-shaped white blooms.
- 🌱 Ornithogalum means 'bird's milk' in Greek, derived from the white milky sap found in some species.
- 🌱 Some Ornithogalum species exhibit nyctinasty, where flowers open in bright daylight and close at night or on cloudy days—a survival mechanism to protect pollen and attract daytime pollinators.
Gardening Terms
New to gardening? Learn about terms used in this guide:
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Star of Bethlehem planting timeline
Tell us your zip code and we'll calculate exactly when to start Star of Bethlehem seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.
Get my Star of Bethlehem timeline →