Walla Walla Sweet Onion Seeds – 100 Seeds, Allium cepa, Large Mild Onions

Walla Walla Sweet Onion is a beloved garden favorite known for its large, mild-flavored bulbs that are perfect for fresh eating, salads, and cooking. This open-pollinated variety produces sweet, juicy onions that are less pungent than many storage types, making them a treat for home gardeners. With 100 seeds, you can grow a generous supply of these delicious onions in your vegetable garden or raised beds.

Walla Walla onions are long-day varieties that perform best in northern regions with long summer days. They are relatively easy to grow from seed and can be started indoors or sown directly outdoors. The plants develop tall, blue-green leaves and produce round, golden-brown bulbs that can reach up to 4 inches in diameter when given proper care.

Plant Features

• Large, mild-flavored bulbs ideal for fresh use
• Open-pollinated, long-day variety
• Sweet and juicy with low pungency
• Attractive blue-green foliage
• Excellent for salads, sandwiches, and cooking

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 consistently moist
• Growth Habit: Upright
• USDA Hardiness Zones: 3-9 (as annual)
• Days to Maturity: 100-120 days from seed
• Spacing: 4-6 inches apart

Planting & Care

Start Walla Walla onion seeds indoors 8-10 weeks before the last frost date for best results, or sow directly outdoors in early spring once the soil can be worked. Plant seeds about 1/4 inch deep and keep the soil evenly moist until germination. Once seedlings are sturdy, thin them to 4-6 inches apart to allow room for bulb development. Onions benefit from consistent watering and a layer of mulch to suppress weeds and retain moisture. Stop watering when the tops begin to yellow and fall over, signaling that bulbs are nearing maturity.

Harvest when the necks soften and the tops dry out. Carefully lift the bulbs and cure them in a warm, dry, well-ventilated area for a few days before storing. Walla Walla onions are best used fresh as they do not store as long as pungent storage varieties, but they can be kept for several weeks in a cool, dry place.

What's Included

100 Walla Walla Sweet Onion seeds (Allium cepa).