Walla Walla Sweet Onion Seeds – 50 Seeds – Large Mild Heirloom Bulbs for the Vegetable Garden

Walla Walla Sweet Onion is a beloved heirloom variety known for its exceptionally large, mild-flavored bulbs. These sweet onions are a favorite among home gardeners for their crisp, juicy texture and lack of the sharp bite found in many storage onions. Whether sliced fresh into salads, grilled, or caramelized, Walla Walla onions add a delicate sweetness to a wide range of dishes.

This variety is well-suited to home vegetable gardens and can be grown as an annual in most climates. The plants produce tall, blue-green tops and develop round, golden-brown skinned bulbs that can reach impressive sizes when given proper care. Their mild flavor makes them perfect for fresh eating, and they are a classic choice for gardeners looking to grow their own sweet onions.

Plant Features

• Heirloom sweet onion variety with large, mild bulbs
• Golden-brown skin and crisp, juicy white flesh
• Excellent for fresh slicing, salads, grilling, and caramelizing
• Grows well in full sun and well-drained soil
• Produces tall, blue-green tops that are easy to grow

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
• Growth Habit: Upright, bulb-forming
• USDA Hardiness Zones: 3-9
• Bloom Season: Not grown for blooms; harvest bulbs in summer
• Mature Height: 12-24 inches
• Germination Requirements: Sow seeds indoors 8-10 weeks before last frost; germinate at 60-70°F
• Spacing: 4-6 inches apart in rows 12-18 inches apart

Planting & Care

Start Walla Walla onion seeds indoors in late winter or early spring, about 8-10 weeks before your last expected frost. Sow seeds shallowly in a seed-starting mix and keep the soil consistently moist but not waterlogged. Provide plenty of light to encourage strong, stocky seedlings. Once the danger of frost has passed and seedlings are several inches tall, harden them off gradually before transplanting into the garden.

Plant seedlings in a sunny location with well-drained, fertile soil. Space them 4-6 inches apart to allow room for bulb development. Water regularly, providing about 1 inch of water per week, and mulch to conserve moisture and suppress weeds. Stop watering once the tops begin to yellow and fall over, which signals that the bulbs are nearing maturity. Harvest when the tops have dried and the outer skins are papery. Cure the bulbs in a warm, dry, well-ventilated area before storing.

What's Included

This listing includes 50 Walla Walla Sweet Onion seeds.