100 Days to maturity. Allium cepa. Ruby Onion Seeds. Non-GMO, annual, open-pollinated, heirloom, cold tolerant, bulbing, long-day onion. Suitable for growing in greenhouses, garden plots, raised beds, and containers. Ruby has a wonderful burgundy color and a deeply globed shape. It was released sometime around 1965 and is appreciated for its high yields. ~8,400 seeds/oz.