
Photos are representative and may not match your specific variety.
Ailsa Craig Sweet Onion
AlliumAllium cepa 'Ailsa Craig'
- Full sun
- Zones 5–10
- 110 days to maturity
- Vegetables
- 4" spacing
- High water
- pH 6–7
Overview
A legendary exhibition onion variety from Scotland that can grow to enormous sizes while maintaining sweet, mild flavor. This pale yellow globe onion is famous for winning competitions and producing bulbs that can weigh 2-3 pounds when grown with proper care. Despite its impressive size, Ailsa Craig maintains excellent eating quality and stores reasonably well.
Planting
Start seeds indoors 10-12 weeks before last frost. Transplant when soil can be worked and plants are pencil-thick.
Growing
Sun: full. Water: high. Soil pH: 6–7. Space plants 4" apart. Germination: 7-14.
Pests & diseases
Common pests: Onion maggot, thrips, aphids, cutworms. Common diseases: Downy mildew, purple blotch, neck rot, pink root.