Seed Swaps

Onion 'Ailsa Craig'

Allium cepa var. cepa

  • 29 plantings
  • 3 available for swap
  • 5 wanted
  • 28 stashed

Ailsa Craig is part of the Allium genus and is a Onion variety. Its scientific name is Allium cepa var. cepa 'Ailsa Craig'. Ailsa Craig is a heirloom (open pollinated) variety.

Long day onion (latitudes 38-60). Large, straw-yellow, long keeping Spanish type. Best for fresh use, not extended storage.

Originated in Scotland.

It is a Vegetable and is treated mainly as a Biennial, This means that it grows best over the course of two years. Ailsa Craig is known for growing to a height of approximately 45.0 cm (that's 1.46 feet in imperial).

United Kingdom is believed to be where Ailsa Craig originates from.

Ailsa Craig Onion is great for inexperienced gardeners and those that like low maintainance gardens.

This variety plant info is provided by the myfolia gardener's wiki. All details about Ailsa Craig have been kindly provided by our members.

How to grow Ailsa Craig

  • Full Sun

  • High

Will not grow well in clay soil. Keep soil moist, keep weeds under tight control.

Position in a full sun location and remember to water often. Keep in mind when planting that Ailsa Craig is thought of as very hardy, so this plant will tend to survive through freezing conditions. Use USDA Hardiness Zone 3 - 10 as your guideline for the appropriate climate for this plant. Ailsa Craig requires a loamy, clay and sandy soil with a ph of 6.0 - 7.0 - it grows best in weakly acidic soil to neutral soil.

Growing Ailsa Craig from seed

Best started in flats 1-4 months before last frost date.

Ensure a distance of 1.95 inches (5.0 cm) between seeds when sowing - look to sow at a depth of approximately 0.98 inches (2.5 cm). Soil temperature should be kept higher than 13°C / 55°F to ensure good germination.

By our calculations, you should look at sowing Ailsa Craig about 28 days before your last frost date.

Transplanting Ailsa Craig

Will grow best in a fairly rich, light loam adequate in potassium, phosphorus, but not too much nitrogen.

Ensure that temperatures are mild and all chance of frost has passed before planting out, as Ailsa Craig is a very hardy plant.

By our calculations, you should look at planting out Ailsa Craig about 28 days before your last frost date.

Harvesting Ailsa Craig

Can grow to five pounds each or more.

Expect harvests to start to occur in early autumn.

Onion Ailsa Craig Etymology

Introduced in 1887 by David Murray, gardener for the Marquis of Ailsa. A cross between Danver’s Yellow and Cranston’s Excelsior.

Ailsa Craig folklore & trivia

Ailsa Craig is a 1,114 feet high volcanic rock in the South Ayrshire council area, Scotland, at the mouth of the Firth of Clyde. Documents from the early 1400s show Crossraguel Abbey as the earliest recorded owner of the island. The Craig is now a bird sanctuary; home too more than 70,000 birds.

A castle was built for the Hamiltons in the 1400s/1500s, a lighthouse was completed in 1886. The Craig has vast quantities of fine granite that was mined for manufacturing curling stones from the early 1800s Р1971. Many of the finest curling stones still used today are made of this granite. Ailsa Craig was acquired by the Kennedy’s of Cassillis in 1560 and is still owned by a member of that family.

Misspellings of Onion 'Ailsa Craig'


Latest Onion 'Ailsa Craig' Reviews

  • First grew these a couple of years back and produced brilliant, huge bulbs. Hope they grow as well again this time around!

    5 stars

    leafykitti about growing Onions
  • First onion I’ve grown from seed. I had 1-2 inch bulbs at the end of the season. I started them inside as well as direct seeds them and did not notice much of a difference.

    3 stars

    Kazedwards about growing Ailsa Craig 1

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