60 days to maturity. Spinacea oleracea. Alrite Spinach Hybrid Seeds. Annual. This beautiful hybrid spinach is both delicious and resistant to disease, weather, and bolting. Its leaves are broad, dark green, and end at a nice point. This Japanese variety grows upright and is best harvested in the fall or winter. It’s a great easy-to-grow variety for your home garden or greenhouse production. If you want to try a new spinach variety this year, Alrite spinach is a perfect choice. ~2,500 seeds / oz.