Onion Growing Guide
Crop Rotation Group
Allium (Onion family) ●
Fertile, well drained soil with compost dug in. In clay soil, grow in raised beds or rows.
Sun or partial shade.
Not normally required, though can be given a liquid feed in spring.
Single Plants: 15cm (5") each way (minimum)
Rows: 10cm (3") with 20cm (7") row gap (minimum)
Sow and Plant
Sow seeds in early autumn to plant out in late autumn
Our Garden Planner can produce a personalised calendar of when to sow, plant and harvest for your area.
Onions will only start bulbing when the days become long enough to expose them to enough light
Harvest as soon as they reach a reasonable size. If storing them, wait until the tops start to die down and dry for about 10 days.
Weed early and often to keep onions growing strong.
Planting and Harvesting Calendar
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