Allium cepa

Onion   Onion   Cebolla   Ziebelonion

Crop Rotation Group : Allium (Onion family)

Soil : Fertile, well drained soil with compost dug in. In clay soil, grow in raised beds or rows.

Position : Full sun.

Frost tolerant : Yes.

Helps: fruit trees, tomatoes, capsicum, peppers, potatoes, brassicas, carrots, Beet, lettuce, cabbage, strawberry
Helped by:
carrots,tomatoes,carrots and African spider plants (Cleome gynandra) together, marigolds (Tagetes ssp),mints
peas, beans
Attracts: Thrips
rabbits, slugs, aphids, carrot-fly, cabbage loopers, cabbage maggots, cabbage worms, Japanese beetles

Sow and Plant : If you don’t start your own seeds, set out sets (small dormant bulbs) or pencil-size seedlings in spring, while the soil is still cool.

Germination: 5-14 days

Spacing : Single Plants: 5″ (15cm) each way; Rows: 3″ (10cm) with 7″ (20cm) row gap (minimum

Feeding : Mix a balanced organic fertilizer into the bed or row before planting your onions, taking care to get it into the soil below the plants. Do not feed plants that are nearing maturity if you want very sweet onions

Harvesting : Harvest young onions as scallions. When bulbs form and the tops of the plants fall over, pull them and cure in a warm place for about 10 days before storing.

Yield per 10ft of row: 10lbs

Time to harvest:100-140days

Troubleshooting : Weed early and often to keep onions growing strong. Seedlings are less likely to bolt (produce flowers) compared to bulb onions grown from sets.

Notes : Onions respond to changing day length. Grow short-day varieties in southern latitudes. Long-day varieties work best in northern areas. Try growing different varieties from seed to explore differences in bulb color, size and shape.