500 Ailsa Craig Onion Seeds | Heirloom Giant Sweet Onion

Ailsa Craig is a beloved heirloom onion variety known for producing exceptionally large, globe-shaped bulbs with a mild, sweet flavor. This Scottish heirloom has been a garden favorite for generations, prized for its impressive size and versatility in the kitchen. Whether you're a seasoned gardener or a beginner, Ailsa Craig onions are rewarding to grow and perfect for adding to salads, sandwiches, and cooked dishes.

These onions are a great choice for home gardens, raised beds, and allotments. They can be started indoors or sown directly outdoors, and they thrive in full sun with well-drained soil. With proper care, you'll be harvesting giant, sweet onions that are sure to impress.

Plant Features

• Heirloom variety with a long history of cultivation
• Produces large, globe-shaped bulbs
• Mild, sweet flavor ideal for fresh eating
• Reliable and easy to grow
• Excellent for storage and culinary use

Growing Information

• Botanical Name: Allium cepa
• Plant Type: Biennial (grown as annual)
• Sunlight: Full sun
• Soil: Well-drained, fertile soil
• Water Requirements: Moderate; keep soil evenly moist
• Growth Habit: Upright
• USDA Hardiness Zones: 3-9
• Mature Height: 18-24 inches
• Spacing: 4-6 inches apart

Planting & Care

Start seeds indoors 8-10 weeks before the last frost date, or sow directly outdoors in early spring once the soil is workable. Sow seeds about 1/4 inch deep and keep the soil consistently moist until germination. Thin seedlings to 4-6 inches apart to allow room for bulb development. Onions require full sun and regular watering, especially during dry spells. Mulch to conserve moisture and suppress weeds. Stop watering when the tops begin to yellow and fall over, signaling that the bulbs are maturing. Harvest when the tops have dried and the necks are tight.

What's Included

500 Ailsa Craig Onion Seeds