Southport Red Globe Onion Seeds – 50 Heirloom Long Day Red Bulb Seeds

Southport Red Globe Onion is a classic heirloom variety prized for its large, globe-shaped bulbs and deep red-purple skin. These onions are a long day variety, meaning they form bulbs best when grown in northern regions where summer daylight hours are long. The crisp, mild to slightly pungent flesh is excellent for fresh eating, salads, and short-term storage. Gardeners appreciate this variety for its reliable performance and attractive color in the garden and kitchen.

Whether you are growing a dedicated onion bed or interplanting with other vegetables, Southport Red Globe onions add both beauty and utility. They can be harvested young as bunching onions or left to mature into full-sized storage bulbs. This heirloom variety has been a favorite for generations and is well-suited to home gardens and market gardens alike.

Plant Features

• Heirloom red onion variety with large, globe-shaped bulbs
• Deep red-purple skin and crisp, mild to slightly pungent flesh
• Long day variety, ideal for northern growing regions
• Good for fresh eating, salads, and short-term storage
• Can be harvested young as bunching onions or left to mature

Growing Information

• Botanical Name: Allium cepa
• Plant Type: Biennial grown as annual
• Sunlight: Full sun
• Soil: Well-drained, fertile soil rich in organic matter
• Water Requirements: Moderate; keep soil consistently moist but not waterlogged
• Growth Habit: Upright, bulb-forming
• USDA Hardiness Zones: 3-9
• Bloom Season: Summer (if left to bolt)
• Mature Height: 18-24 inches
• Germination Requirements: Sow seeds indoors 8-10 weeks before last frost or direct sow in early spring; soil temperature 50-75°F
• Spacing: 4-6 inches apart in rows 12-18 inches apart

Planting & Care

Start Southport Red Globe onion seeds indoors 8-10 weeks before your last expected frost date. Sow seeds about 1/4 inch deep in a seed-starting mix and keep the soil consistently moist. Provide plenty of light to prevent leggy seedlings. Harden off seedlings before transplanting outdoors after the danger of frost has passed. Space transplants 4-6 inches apart in rows 12-18 inches apart. For direct sowing, plant seeds as soon as the soil can be worked in spring.

Onions require consistent moisture during the growing season, especially while bulbs are forming. Reduce watering as bulbs mature and tops begin to yellow. Stop watering completely once tops fall over to allow bulbs to cure. Harvest when tops have dried and fallen, then cure bulbs in a warm, dry, well-ventilated area for 2-3 weeks before storing. Long day varieties like Southport Red Globe need 14-16 hours of daylight to form bulbs, so they perform best in northern latitudes.

What's Included

50 Southport Red Globe Onion seeds.