Description
Botanical name
Allium cepa var. cepa
Family
Alliaceae
Spacing
Space 12-15 cm (5-6″) apart in rows that are 45-75 cm (18-30″) apart. Thin to 8 cm (3″) apart.
Depth
Plant seeds 6-12 mm (¼-½”) deep.
Requirements
Prefers a sunny site with fertile, well-drained but moist soil.
Germination
Seeds will sprout in 10-14 days.
Pests
Onion maggots, thrips
Timing
Plant in the spring if given a really early start indoors (but then bulbs are not as mild or large), or in August to overwinter (best choice).
Growing
Bend over any flower stalks that start to grow so the plant’s energy goes into building the bulb. Keep a clean garden; thrips live in weeds from previous years.
Harvest
Matures in 300 days fall sown, in 150 days, spring sown
Season
Cool, perennial
