This is the classic large overwintering onion of the Pacific Northwest. A very large, juicy onion with a mild sweet flavour. It can be planted in the spring if given a really early start indoors, or in August to overwinter. Spring planted Walla Walla sweet onion seeds result in bulbs that are not quite as mild as the overwintered ones. And spring sown Walla Walla onions may not size up as well. We recommend that home gardeners should wait and plant for overwintering onions. Walla Walla is hardy to -23°C (-10°F). It is most definitely a long day onion, suitable for planting between the 35th and 55th parallels. Walla Walla does not have good storage ability, but man, it makes beautiful caramelized onions!
Matures in 150 days, spring sown – 300 days fall sown. (Open-pollinated seeds)