Onions: Sowing, planting and harvest calendar
How do you sow onions outdoors?
Sow your onions outdoors in spring when the soil warms up and becomes workable. Choose a sunny position and prepare a fine, weed-free, well-drained seedbed, without fresh manure. Adjust the timing to your climate and the seed packet instructions.
Sow thinly about 1–1.5 cm deep, in rows 20–30 cm apart. Cover with fine soil, firm gently and water without dislodging the seeds. Keep the surface moist until germination, without soaking it. Thin progressively to leave about 10 cm between plants intended to form large bulbs: final spacing is not a compulsory distance between individual seeds.
Weed by hand near young plants to protect the shallow roots. Water during dry spells while they are growing. Direct-sown plants can stay in place; transplanting is not needed to enlarge the bulbs. For a storage crop, let them mature before drying them.
When should onions be planted?
How to care for this plant
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Weed
Remove weeds around young bulbs, especially if they shade them. Close to the plants, weed by hand to protect the roots and avoid damaging the bulbs.
How to harvest onions
