Sweet Spanish Colorado #6 Onion Seeds – 50 Large Yellow Storage Onions

Sweet Spanish Colorado #6 Onion Seeds produce large, globe-shaped yellow onions with a mild, sweet flavor that is excellent for fresh eating, slicing, and cooking. This open-pollinated variety is a longtime favorite among home gardeners for its dependable performance and good storage quality. The golden-brown skin and crisp, white interior make these onions a versatile addition to the vegetable garden and kitchen.

These onions are a great choice for garden beds, raised beds, and container growing. They can be harvested young as green onions or left to mature into full-sized bulbs for storage. With proper curing, the bulbs keep well for months, providing a steady supply of homegrown onions through fall and winter.

Plant Features

• Large, globe-shaped yellow bulbs with mild, sweet flavor
• Open-pollinated storage onion variety
• Excellent for fresh use, cooking, and long-term storage
• Can be harvested young as green onions or mature bulbs
• Adaptable to a range of garden settings

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, bulb-forming
• Bloom Season: Summer (if left to bolt)
• Mature Height: 18–24 inches
• Spacing: 4–6 inches apart

Planting & Care

Sow seeds indoors 8–10 weeks before the last frost date, or direct sow in the garden as soon as the soil can be worked. Plant seeds about 1/4 inch deep in a sunny location with well-drained soil. Keep the seedbed consistently moist until germination, which typically occurs in 7–14 days. Thin seedlings to 4–6 inches apart to allow proper bulb development.

Onions benefit from regular watering and a light application of fertilizer during the growing season. Stop watering as bulbs approach maturity to encourage proper curing. Harvest when the tops begin to yellow and fall over, then cure the bulbs in a warm, dry, well-ventilated area before storing in a cool, dark place.

What's Included

50 Sweet Spanish Colorado #6 Onion Seeds.