Walla Walla onions are a delightful variety known for their large size, sweet flavor, and superb taste. These long-day onions thrive in northern gardens, making them a perfect choice for home growers looking to enjoy fresh, home-grown onions.
Walla Walla onions prefer full sun and well-draining soil rich in organic matter. They are cold-hardy and can be planted outdoors early in the spring when the threat of frost has passed. These alliums require a long daylight period to develop their characteristic large size and sweet flavor.
Plant Walla Walla onion seeds or seedlings about 1/4 inch deep and 1 inch apart in rich, well-prepared soil. As they grow, thin the seedlings to about 3-4 inches apart to allow room for bulb development. Keep the soil consistently moist but not waterlogged. Fertilize with organic compost or a balanced fertilizer as needed.
Onions may experience issues like onion fly infestation, neck rot, or drought stress. To prevent these problems, practice crop rotation, avoid overwatering, and ensure good air circulation around plants. If pests become a concern, use organic insecticidal soaps or neem oil for control.
Walla Walla onions are ready to harvest when the tops have fallen over and the bulbs feel firm. Carefully dig up the onions, brush off excess soil, and let them dry in a cool, shaded place before storing in a cool, dry location. Enjoy these sweet, juicy onions fresh, cooked, or pickled.