Onion 'Red Marksman' Growing Guide

Quick answer

Onion 'Red Marksman' is a late-planting red onion that stores exceptionally well. Start seeds indoors in late winter, transplant in spring, and harvest in late summer for a sweet, crisp crop.

Growing steps

1. Sow seeds indoors: Sow seeds 6–8 weeks before the last frost date in seed trays filled with quality seed-raising mix. Cover lightly with mix and keep moist at 15–20°C. Common mistake: sowing too deep or letting the mix dry out delays germination.
2. Harden off and transplant: Once seedlings reach 10–15 cm tall and frost risk has passed, gradually acclimate them to outdoor conditions over a week. Plant 10 cm apart in well-drained soil with full sun. Checkpoint: space rows 30 cm apart to allow bulb development and airflow.
3. Water and weed regularly: Keep soil consistently moist but not waterlogged. Mulch with straw to suppress weeds and retain moisture. Onions have shallow roots, so avoid deep cultivation near the plants. Common mistake: overwatering or allowing weeds to compete for nutrients.
4. Harvest and cure: When the tops yellow and fall over, gently lift bulbs with a fork. Cure in a warm, airy spot for 2–3 weeks before trimming tops and storing in a cool, dry place. Checkpoint: do not wash bulbs before curing—dirt protects the outer skin.

Product details

• Onion 'Red Marksman': This late planting variety stores exceptionally well for a red onion. The white flesh is crisp and juicy and has a sweet, fruity flavour. You can enjoy homegrown onions months after harvest without worrying about early spoilage.