70-80 Days to maturity. Zea mays. Mirai 421 Hybrid (Treated) Corn Seeds. Non-GMO, annual, hybrid, Sweet Corn. Suitable for growing in garden plots or raised beds. Corn tolerates heat and drought-prone regions. Mirai®421 white corn hybrid caught the farmers' market world in a chokehold. People drive miles just for a taste of Mirai! 421 is the single-colored variety of the trio that makes up the Mirai collection. It is among the best in taste, flavor, durability, and texture in available corn types. Mirai will hold its quality for 10-14 days when kept in the husk and refrigerated. In the development of Mirai, no genetic modification or biotechnology traits were applied; it has been created exclusively through natural selection. ~235 seeds/oz.