Walla Walla Sweet Onion (Allium cepa), also known as "the world's best tasting onion!" Hailing from Walla Walla, Washington, this onion is known worldwide!
Excellent for planting in the north in the fall and overwintering, where the flat-shaped bulbs will grow to 5"-6" in 300 days. If planted in the spring, expect 2.5"-3" bulbs after 150 days. Not the greatest for storing, so you'll definitely want to use it soon after harvest.