Onion Exhibition Seeds

The best time to start sowing Exhibition onion seeds is indoors from December to early February. Sow the seeds in trays filled with a fine seed compost, cover lightly, and keep them in a warm spot (around 18–21°C) for germination. Once seedlings have two true leaves, transplant them into pots and harden off before planting outside after the last frost.

To prevent bolting from your onion exhibition seeds, start seeds indoors in early winter and transplant after the last frost to avoid temperature stress. Keep the soil consistently moist but not waterlogged to reduce the stress that triggers bolting. Provide good light and support seedlings as they grow to ensure strong, straight plants that develop well-formed bulbs.

To protect your Exhibition onion seeds and bulbs from pests and diseases, cover the plants with insect-proof mesh or fine netting to block onion flies. Remove and destroy infected plants to prevent spread, whilst mulching helps deter pests and maintain healthy soil, ensuring stronger onion growth.