Allium cepa, commonly known as the onion, is a member of the Alliaceae family and originates from Turkmenistan. This annual plant thrives in full sun with moist, light (sandy) to medium soil, making it adaptable to various garden conditions across hardiness zones 3-9. Onions are both edible and ornamental, valued for their culinary uses as well as their attractive appearance in the garden. One distinctive feature of this plant is its height of about 0.6 meters and width of 0.3 meters; another notable characteristic is that all parts—flowers, leaves, root, and seed—are edible. Onions can be propagated through direct sowing or transplanting seeds, with outdoor planting recommended in spring or fall at a spacing of 2-6 inches.
Allium cepa, commonly known as the onion, is a member of the Alliaceae family and originates from Turkmenistan. This annual plant thrives in full sun with moist, light (sandy) to medium soil, making it adaptable to various garden conditions across hardiness zones 3-9.
Traditionally used for digestion. Each claim is evidence-rated — see Section II for full citations.
Traditional context only. This reviewed claim keeps the original low confidence level, but avoids treatment, disease, dosage, or guaranteed-effect language.
Start with direct sowing in spring or fall for a simple and rewarding beginner project.
Seeds, a garden plot or large container, soil, water.
Plant seeds directly outdoors in early spring or late summer/fall.
Use well-draining soil with plenty of organic matter. Ensure containers are at least 12 inches deep.
Direct sow seeds 0.5-1 inch deep, spacing them about 2-6 inches apart.
Keep soil consistently moist and provide full sun exposure to help seedlings establish.
Water regularly but avoid overwatering. Fertilize lightly every few weeks with a balanced organic fertilizer.
Remove spent flowers to encourage bulb growth, and harvest leaves when needed for cooking.
Overwatering, planting too deep, neglecting to remove spent blooms.
These plants help — by repelling pests, fixing nitrogen, attracting pollinators, or sharing space well.
Avoid planting nearby — competition, allelopathy, or shared pests/diseases.
Plants you might compare or use together — scored by shared family, common use cases, and growing requirements.
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