Cortland Onion Seeds (Organic)

Cortland Onion (Allium cepa) is an F1 hybrid long-day onion bred for exceptional storage, producing large, uniform, round bulbs 3 to 4" across with thick orange-yellow skin. Developed from Prince and Copra, it offers sweet, mild flavor and crisp texture plus tolerance to pink root and fusarium.

At a glance

• Variety: Cortland onion (Allium cepa), long-day
• Type: Biennial, F1 hybrid, organic
• Days to maturity: 105-110 days
• Sun: Full sun
• Spacing after thinning: 4" to 6"
• Planting depth: 1/4" to 1/2"
• Germination: 4-10 days
• Approx. seeds per pack: 100 (6,594 per oz bulk)

Best for

• Long-term storage onions for winter use
• Garden beds and raised beds
• Cool to temperate, long-day regions
• Gardeners wanting disease-tolerant bulbs
• Fresh eating, slicing, and cooking

How to grow

Sow indoors in flats in early spring, or direct sow outdoors as soon as the soil is workable, covering seeds with 1/4" to 1/2" of fine soil. Germination takes 4-10 days. Thin or transplant to 4" to 6" apart in full sun and well-fertilized, moderately moist soil. When mature, bend the tops, let the bulbs cure until the leaves brown, then dry and store in a cool, dry, ventilated space.

Flavor profile

Sweet and mild with a crisp texture, good for fresh eating and slicing as well as cooking, where the flavor mellows further.

About Grow Organic

Grow Organic offers organic and heirloom seeds alongside natural growing supplies, helping gardeners raise nutritious food with earth-friendly methods.