Zea mays has been cultivated in the Americas for roughly 9,000 years, selectively bred from a grassy wild ancestor called teosinte into the substantial plant that feeds more of the world than any other cereal. In the home garden it behaves more like a seasonal installation than a typical vegetable: planted in blocks rather than rows to ensure wind pollination, it rises to 5 to 8 feet tall and demands sun, heat, and consistent soil moisture from the time it germinates until the ears are ready. Soil should reach 60 degrees before seed goes in, and the heavy nitrogen demand means feeding early and consistently through the season.

The practical details matter here more than with most crops. Block planting of at least 12 plants is essential for pollination. Roots are shallow and easily damaged, so thin by cutting rather than pulling, and mulch once the plants are established to suppress weeds without disturbing the root zone. Water at the soil level rather than overhead, as wet tassels can compromise pollination. Sweet corn varieties cross-pollinate readily with field corn and ornamental types, so separation of at least 250 feet or careful timing of planting dates is necessary when growing multiple types in the same season.