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For successful seedlings,
see the growing notes at the bottom of the page!
Autumn onion (Allium stellatum) is a captivating perennial that stands out with its upright flower stems, each crowned with an umbel of small, star-shaped blooms in vibrant pink or purple. These flowers appear in late summer to early fall, delivering a striking burst of colour when many other plants are winding down for the season. Besides its ornamental appeal, autumn onion attracts a variety of pollinators, making it an excellent addition to natural gardens and urban meadows. it is a low-maintenance plant that adapts well to different soil types, but it thrives best in well-drained soils and sunny locations. Once established, autumn onion is also drought-tolerant, making it an ideal choice for water-efficient gardens and drier climates.
Medicinal and Culinary Uses
Though less commonly used in the kitchen compared to other allium species, autumn onion offers edible bulbs and leaves with a mild flavour reminiscent of garlic and onion. These parts can be incorporated into dishes to add a subtle aromatic touch. In traditional medicine, some cultures value the bulbs for their diuretic and digestive properties, bringing an added medicinal use to this attractive plant.
Ecological Role
Autumn onion plays a vital role in Quebec’s ecosystems. Its flowers bloom when few other plants are flowering, offering a late-season nectar source for numerous pollinators, including bees and butterflies. By providing this essential resource, autumn onion helps support the pollination of nearby plants. Integrating this plant into gardens promotes biodiversity and creates a welcoming habitat for pollinators, enhancing the health and resilience of local ecosystems.
Autumn onion seeds require cold stratification to ensure germination. See the cultivation notes below for more details.
Akène cannot assume any responsibility for the use of plants for therapeutic purposes. Always seek advice from a professional before using a medicinal or edible plant.
Sowing and Growing
Technical Details
Seeds per packet: 100
Family: Amaryllidaceae
Scientific name: Allium stellatum
Life cycle: Perennial
Hardiness zone: 3
Soil type: Sandy to silty
Soil moisture level: Dry to medium
Soil - additional attributes: Well-drained
Light: Sun, partial shade
Blooming: July to August
Spacing: 15 cm
Height: 35 cm
Deer resistance: High
Stratification: 60 days
Scarification: No
Germination time: 5 to 15 days
Sowing depth: 5 mm