Onion Ailsa Craig - Unwins
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The Unwins Onion Ailsa Craig is an ideal choice for both home gardeners looking for a reliable crop and competitive growers aiming for large, impressive bulbs. Renowned for its weight and golden-straw appearance, this variety provides a mild, versatile flavour suitable for a wide range of culinary uses; however, growers should be prepared to manage the longer growing season required to reach the full potential of these exhibition-grade onions.
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| Brand | Unwins |
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FAQs
When is the best time to sow Ailsa Craig seeds?
You can sow indoors from January to March, or directly outdoors from March to April.
Is this variety good for long-term storage?
Yes, it has excellent keeping qualities provided the bulbs are properly cured and stored in a cool, dry place.
Can I grow these in containers?
Yes, they can be grown in deep containers, provided you use high-quality potting mix and ensure adequate drainage.
What kind of soil do onions prefer?
They thrive in fertile, well-drained soil with a neutral pH.
Why are they called 'show' onions?
They are frequently used in competitive vegetable growing because they reliably produce very large, uniform, and aesthetically pleasing bulbs.
Troubleshooting
Slow seedling growth
Ensure seedlings are receiving at least 12-14 hours of bright, natural light or use a supplementary grow light.
Bulbs remaining small
Ensure the plants are spaced correctly at 10-15cm intervals to avoid competition for nutrients.
Bulb rot at harvest
Cease watering as the tops fall over and ensure maximum airflow during the curing process.
Pros and Cons
Pros
- Ideal for both exhibition and culinary use
- Large bulb potential for high-yield harvests
- Excellent storage life when cured correctly
- Mild, versatile taste profile
Cons
- Requires a longer growing season than some early-maturing varieties
- May require extra care to reach maximum exhibition weight
- Indoor sowing requires space and light management
Setup, Compatibility & Care
For the best results, sow seeds in a fine, seed-starting compost tray if beginning indoors, maintaining a steady temperature. When planting outdoors from March to April, ensure the site receives full sun and has been cleared of weeds. Maintain consistent moisture throughout the growing season, but reduce watering as the tops begin to yellow and fall over in late summer to prevent rot. Once harvested in August, bulbs should be dried (cured) in a warm, airy spot until the outer skins are dry and papery to ensure they survive long-term storage.