160 Days to maturity. Allium cepa. Shonan Red Onion Seeds. Non-GMO, annual, open-pollinated, heirloom, cold tolerant, bulbing, intermediate-day onion. Suitable for growing in greenhouses, garden plots, and raised beds. The name Shonan comes from a region in Kanagawa Prefecture. The onion has excellent flavor with a crisp, sweet, mild pungency that makes it excellent for salads. Utilize any part of this plant for its onion flavor. ~ 8,500 seeds / oz.