Ailsa Craig Onion Seeds
Allium cepa — Ailsa Craig Onion is a classic exhibition-type onion grown for very large mild bulbs, sweet flavor, and impressive garden harvests.
This guide covers growing conditions, seed-starting basics, garden uses, and ordering information for Seedman customers.
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Plant Profile
Allium cepa
Ailsa Craig Onion
Onion vegetable seeds
Cool-season biennial grown as annual
Large bulb onion plants
Full sun
Why Grow Ailsa Craig Onion?
Ailsa Craig Onion is a classic exhibition-type onion grown for very large mild bulbs, sweet flavor, and impressive garden harvests. It is a useful addition for gardeners looking for distinctive seed-grown plants with edible, ornamental, herbal, landscape, grass, or collection value.
- Large onions
- Sweet onions
- Kitchen gardens
- Exhibition vegetables
Seed Germination Guide
Start indoors 8–10 weeks before transplanting or direct sow in mild climates. Keep evenly moist and transplant to fertile soil with full sun.
Seed germination can vary by freshness, storage, temperature, and growing conditions. Use clean containers and a well-drained seed-starting medium.
Garden & Landscape Uses
Ailsa Craig Onion can be used where its mature size, sunlight needs, and moisture preferences are matched to the site. For best performance, provide full sun and regular moisture; fertile well-drained soil.
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Visit the original Seedman product page for current availability, package sizes, and ordering details.
View Seedman Product PageFrequently Asked Questions
What is Ailsa Craig Onion best for?
Ailsa Craig Onion is grown for kitchen harvests, fresh use, cooking, and cool-season vegetable gardens.
When should onion seed be started?
Onions are often started indoors early or direct sown in mild climates.
Do onions need full sun?
Yes. Full sun and fertile soil help bulbs or stalks develop well.
Do onions need steady moisture?
Yes. Even moisture supports steady growth, especially while bulbs are forming.