Best Ailsa Craig Onion Plants for Home Gardens and Small Farms
Answering the search intent for gardeners seeking reliable Ailsa Craig onion plants, this guide highlights five practical options with strong long-day performance and jumbo bulbs. These selections are best for northern and temperate climates, and they cater to home gardeners, market growers, and competition enthusiasts looking for mild, sweet yellow onions. Each product is evaluated for yield, maturation time, and suitability for various growing conditions, with practical buying considerations.
| Product | Best For | Why It Stands Out |
|---|---|---|
| Survival Garden Seeds – 1 Pack | Home gardeners seeking reliable jumbo bulbs | Long-day, high-yielding, proven jumbo bulbs in 110–120 days |
| A.P. Whaley – Bulk Seed Packet | Bulk plantings and commercial-style growing | Historic variety, potential up to 2 lb bulbs, long-day type |
| Sow Right Seeds – Long Day Collection | Variety exploration in home gardens | Includes Ailsa Craig plus other heirlooms for mix planting |
| Survival Garden Seeds – 2 Packs | Better value and multiple growing opportunities | Two-pack option matching the same jumbo, mild flavor profile |
| Survival Garden Seeds – 6 Variety Pack | Diverse garden with backup onion types | Broad collection including Ailsa Craig for rotation |
Survival Garden Seeds — Ailsa Craig Onion Seeds (1 Pack)

SWEET JUMBO ONION VARIETY — Classic Ailsa Craig onions produce mild, sweet yellow bulbs prized for their giant exhibition size and delicate flavor; perfect for slicing fresh, caramelizing, or showcasing in competition gardens.
LONG DAY ONION FOR NORTHERN GARDENS — Reliable long-day variety ideal for northern and temperate climates; thrives where summer days exceed 14 hours and forms uniform jumbo bulbs in 110–120 days.
HIGH YIELDING, EARLY MATURING — Vigorous growth and strong tops support large, evenly shaped bulbs; consistent performance and dependable yields for home gardeners and market growers alike.
Best for: Gardeners seeking a proven jumbo onion for a dedicated Ailsa Craig grow plan. Caution: Data notes long-day adaptation; performance may vary with local day length and climate.
A. P. Whaley — Ailsa Craig Onion Bulk Seed Packet

Ailsa Craig Onion: Bulk Seed Pack, First introduced in 1887 by David Murray, gardener for the Marquis of Ailsa. An incredible onion with mild, sweet flavor, capable of growing to 2 pounds each. Long-day type; 100 days from transplant. Pack size: 1/2 oz (3,234 seeds).
Best for: Commercial-style plantings or bulk home gardens seeking large bulbs with historical pedigree. Limitation: Bulk seed descriptions may not specify germination guarantees; plan for proper seedling establishment and soil prep.
Sow Right Seeds — Long Day Onion Seed Collection

Six-variety collection includes Yellow Sweet Spanish, Ringmaster, Ruby Red, Ailsa Craig, and Walla Walla. Each packet provides a different heirloom option to diversify flavor and color in a single planting window.
Best for: Home gardeners who want a diverse onion portfolio and a chance to compare Ailsa Craig with other long-day varieties. Caution: Seed packets include a vendor mix; check germination expectations and planting times for your climate.
Survival Garden Seeds — Ailsa Craig Onion Seeds (5 Packs)

SWEET JUMBO ONION VARIETY — Classic Ailsa Craig onions produce mild, sweet yellow bulbs prized for their giant exhibition size and delicate flavor; perfect for slicing fresh, caramelizing, or showcasing in competition gardens.
LONG DAY ONION FOR NORTHERN GARDENS — Reliable long-day variety ideal for northern and temperate climates; thrives where summer days exceed 14 hours and forms uniform jumbo bulbs in 110–120 days.
HIGH YIELDING, EARLY MATURING — Vigorous growth and strong tops support large, evenly shaped bulbs; consistent performance and dependable yields for home gardeners and market growers alike.
Best for: Gardeners who want multiple packs to establish a broader Ailsa Craig program, or to share with fellow growers. Caution: As with bulk seeds, verify seed viability and optimal transplant timing for your region.
Survival Garden Seeds — Ailsa Craig Onion Seeds (2 Packs)

SWEET JUMBO ONION VARIETY – Classic Ailsa Craig onions produce mild, sweet yellow bulbs prized for their giant exhibition size and delicate flavor; perfect for slicing fresh, caramelizing, or showcasing in competition gardens.
LONG DAY ONION FOR NORTHERN GARDENS — Reliable long-day variety ideal for northern and temperate climates; thrives where summer days exceed 14 hours and forms uniform jumbo bulbs in 110–120 days.
HIGH YIELDING, EARLY MATURING — Vigorous growth and strong tops support large, evenly shaped bulbs; consistent performance and dependable yields for home gardeners and market growers alike.
Best for: Those seeking a back-to-back growing season or added seed stock. Caution: Check the total seed count per pack to plan spacing and thinning accurately.
Buying Guide: How To Choose Ailsa Craig Onion Seeds And Plants
What day length suits your climate? Ailsa Craig is a long-day onion variety, typically performing better where summer days exceed 14 hours. If you live in cooler northern areas, ensure appropriates days-to-maturity and transplant timing align with your local frost-free window.
What form do you prefer? Seed packets offer fresh start for home gardeners and scalable plantings, while bulk or multi-pack options suit commercial growers or multi-season gardens. Consider your storage plan for harvested bulbs when choosing large packets or sets.
Which accompanying varieties fit your garden? Ailsa Craig is often grown alongside other long-day or heirloom onions. A mixed collection can reduce rotation risk and provide flavor diversity, especially for cooking and displays.
What is your planting timeline? Some sets advertise 95–120 days to maturity after transplant, while others estimate 100 days from transplant. Plan around frost dates and expected harvest windows to maximize bulb size and sweetness.
Soil and care considerations: Onions prefer well-drained soil with ample organic matter. Regular watering during bulb formation supports uniform sizing, and top growth helps deter weeds. Mulching can help regulate moisture and temperature in exposed beds.
FAQ
- Q: Is Ailsa Craig suitable for all climates?
- A: It is a long-day variety that performs best in northern and temperate regions with long summer days. In milder climates, success depends on day length and season length.
- Q: How long does Ailsa Craig take to mature?
- A: Transplants typically mature in about 110–120 days to form jumbo bulbs, depending on conditions.
- Q: Should I start from seed or bulbs?
- A: Starting from seed provides flexibility and season extension, while bulbs or sets can simplify early establishment in regionally suitable climates.
- Q: Can I grow Ailsa Craig with other onion varieties?
- A: Yes. A diverse collection can reduce risk and provide multiple harvest times, but ensure spacing and cultivation requirements are met for each variety.
- Q: What is the best way to store harvested Ailsa Craig onions?
- A: Cure bulbs in a warm, dry, ventilated area before storing in a cool, dark, dry place to maximize shelf life.