Star of Bethlehem Plant: Growing Guide and Invasive Concerns

The Star of Bethlehem (Ornithogalum) captivates with star-shaped white flowers but demands careful management due to its aggressive spreading habit and potential toxicity. Native to the Mediterranean, this bulbous perennial thrives in USDA zones 4-11.

Plant Profile

Belonging to the lily family, Star of Bethlehem grows from bulbs producing grass-like basal leaves and slender stalks topped with flower clusters up to 30 cm across. Popular species include O. arabicum, O. umbellatum (common), O. nutans (drooping), O. pyrenaicum (spiked), and O. narbonense (pyramidal). Bees serve as primary pollinators.

Cultivation Methods

From bulbs: Plant 7-15 cm deep in well-drained soil, spaced 10-15 cm apart. For summer blooms, plant in spring; for spring flowers, plant in autumn. Full sun yields best flowering, though partial shade is tolerated with reduced vigor.

From seeds: Sow in flats, cover with plastic, and refrigerate 3 weeks before moving to shade. Transplant seedlings to sunnier locations once established. Seed-grown plants take longer to flower.

Critical Considerations

Several Ornithogalum species are toxic to grazing animals and pets. The plant's aggressive growth and herbicide-resistant foliage make containment challenging. Growing in containers prevents garden invasion and protects animals. Ensure excellent drainage—overwatering damages bulbs. Foliage dies back by mid-summer after spring growth.