Eclipse L303 White Onion - Short Day

Grow crisp, mild white onions perfect for Southern gardens with Eclipse L303 – a premium short-day variety that produces large, globe-shaped bulbs with brilliant white skin and sweet, mild flavor. Ideal for fresh eating, grilling, and cooking, these onions thrive in warmer climates and deliver exceptional yields with minimal fuss.

Growing Information

• Days to maturity: 110-120 days from transplant
• Planting: Start seeds indoors 8-10 weeks before transplanting, or plant sets/transplants in fall (zones 7-9) or early spring (zones 3-6); plant 1 inch deep, 4-6 inches apart
• Spacing: Rows 12-18 inches apart
• Sun: Full sun (6-8 hours daily)
• Zones: 3-9 (short-day variety best suited for southern regions)
• Best for: Latitudes south of 35°N (southern US)

Harvest & Use

Harvest when tops begin to fall over and turn yellow-brown, typically in late spring to early summer. Pull bulbs and cure in a warm, dry, well-ventilated area for 2-3 weeks until outer skins are papery. Eclipse onions offer crisp texture and mild, sweet flavor perfect for fresh salsa, grilling, caramelizing, or slicing raw for sandwiches and salads. Store cured onions in a cool, dry location for several months.

Care Tips

Short-day onions require 10-12 hours of daylight to form bulbs, making them ideal for southern gardens. Plant in well-drained, fertile soil with consistent moisture – onions are shallow-rooted and need regular watering. Side-dress with nitrogen fertilizer when plants are 6-8 inches tall. Keep beds weed-free as onions don't compete well. Companion plant with carrots, beets, or lettuce for efficient garden space use.

Why Choose Eclipse L303

This reliable short-day variety offers exceptional bulb size, mild flavor, and disease resistance perfect for southern climates. Whether you're growing for fresh summer eating or building your storage pantry, Eclipse L303 delivers consistent performance and superior quality that makes homegrown onions worth the effort.