Ailsa Craig Onion, Long Day 1887 Hierloom
Ailsa Craig Onion, Long Day 1887 Hierloom

Ailsa Craig Onion, Long Day 1887 Hierloom

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)oAilsa Craig Onion - Firefly Farm & Mercantile
Heirloom Garden Favorites for Your Homestead

Elevate your onion harvest with the legendary Ailsa Craig Onion—a true giant among heirlooms, prized by gardeners and exhibitors alike. Perfect for fresh eating, cooking, or entering at the county fair! 

"The Ailsa Craig onion... has produced bulbs weighing over twelve pounds."
– The Garden magazine, 1905 (UK Horticultural Society records)

Overview

The Ailsa Craig is a massive, globe-shaped yellow onion renowned for its sweet, mild flavor that shines raw in salads or caramelized in dishes. Bulbs typically reach 4-6 inches in diameterand weigh 1-2 pounds each, with thin, papery skins and firm, white flesh that stores exceptionally well for months in cool, dry conditions. This variety matures in 110-120 days from seed, yielding abundant crops in fertile soil. It's resistant to bolting and pink root disease, making it reliable for home gardens. Expect a harvest of show-worthy onions that outsize standard varieties! This variety is grown for fresh eating and short term storage. 

Origin and History

Named after the rugged Ailsa Craig island off Scotland's Ayrshire coast—a granite rock known as "Paddy's Milestone" for Irish immigrants—these onions trace their roots to Lanarkshire, Scotland, around 1880. Selected by David Murray, a market gardener, the strain was first exhibited in 1887 and quickly gained fame at British horticultural shows. By the early 1900s, it crossed the Atlantic, becoming a staple in North American seed catalogs. Today, it's preserved as a pure heirloom by organizations like Seed Savers Exchange, celebrated for producing record-breaking giants (over 10 pounds in competitions!).

"Ailsa Craig onions are the aristocrats of the onion world—sweet enough to eat like apples." – Historic gardening lore

How to Plant

Ailsa Craig thrives in full sun (6-8 hours daily) and well-drained, fertile soilwith a pH of 6.0-7.0. Amend with compost for best results.

  1. Start Seeds Indoors (recommended for largest bulbs): Sow 8-10 weeks before last frost in trays at 70-75°F. Keep soil moist; thin to strongest seedlings.
  2. Transplant Outdoors: After danger of frost, space seedlings 4-6 inches apartin rows 12 inches apart. Plant 1-2 inches deep, with tips just above soil.
  3. Direct Sow Option: In zones 5+, sow in early spring, ½ inch deep, thinning to final spacing.
  4. Care Tips:
    • Water consistently (1 inch/week); mulch to retain moisture.
    • Fertilize with balanced organic feed every 3-4 weeks.
    • Weed diligently—onions compete poorly.
  5. Harvest: When tops yellow and fall over (late summer), gently lift bulbs. Cure in a warm, dry spot for 2 weeks, then store at 32-40°F.

Order Now for Spring Planting!

Grow the giants at Firefly Farm & Mercantile—your source for heritage seeds since 2019. Questions? Contact us! 🌱

Ailsa Craig Onion, Long Day 1887 Hierloom Reviews