Is sweet corn perennial or annual?

Answer 1

Sweet corn and all corn that we use commercially is annual, and must be replanted every year. There are varieties that have been crossed with Zea Teosinte (a wild relative of corn/maize native to Mexico) that are perennial.

However, these crosses do not produce near as much as annual corn by nature of being perennial. They put much more effort into their root systems and store much of their energy in rhizomes for use the following year. They have been known to live 3 years or more.