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Allium USDA Organic Walla Walla Onion, Allium cepa 'Walla Walla', is a large, sweet Spanish onion with light brown skin and mild white flesh. Famous for its sweet flavor in fresh eating. Very cold hardy, it can be directly sown in mid spring. 'Walla Walla' is perhaps the most popular sweet onion with a nice mild, sweet flavor and non pungent aroma. Some people eat them like apples. Walla Walla grows to 4 inches across. Onions are a hardy biennial grown as annuals. Leaves and flower stalks are hollow and bases swell to form a bulb. Walla Walla is a long day onion. “Long day” type onions, which need 13 16 hours of daylight, do best in the North “Short day” types do best in the South. “Day neutral” types grow well anywhere.
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