Planting Sweet Corn
Sweet Corn is a warm season vegetable in the Poaceae family. Getting the timing right is the difference between a strong stand and a disappointing one, so the windows below are given relative to your own last spring frost and first fall frost rather than a generic calendar date. Look up your local frost dates and count back or forward from there.
Sow Sweet Corn directly into the garden 1–2 weeks after your last frost, once the soil has warmed.
Spacing and Planting Depth
Give Sweet Corn room to mature. The figures below come from verified extension and seed-supplier data for typical varieties.
| Spacing in row | 12 inches |
|---|---|
| Row spacing | 30 inches |
| Plants per sq ft | 0.4 |
| Planting depth | 1 inches |
| Sun requirement | Full sun |
Days to Maturity
Sweet Corn reaches maturity in 65–90 days from sowing.
For a continuous harvest, sow a new batch every 14 days. Use the succession planting scheduler →
Sweet Corn is ready to harvest after about 78 days. Harvest before the first fall frost, which will end the plant's productive season.
Conditions and Care
As a warm-season vegetable, Sweet Corn needs warm soil and settled weather to thrive, and is set back or killed by frost. It is frost tender, so wait until all danger of frost has passed before planting out and harvest before the first fall frost.
Sweet Corn needs full sun — give it at least six hours of direct light a day for the best growth and flavor. Sow seed about 1 inch deep, then keep the soil evenly moist until seedlings establish.
Sweet Corn belongs to the Poaceae family; rotating where you grow members of this family each year helps limit the build-up of soil-borne pests and disease. Because it matures relatively quickly, Sweet Corn rewards succession sowing: small, repeated plantings keep a steady supply coming rather than one short glut.
Companion Plants
Pairing Sweet Corn with the right neighbors can improve growth and deter pests; a few combinations are best avoided.
Grows well with: Bush Beans (Snap), Cucumber, Winter Squash, Pumpkin
Keep away from: Tomato
Growing Notes
Plant in blocks of at least 4 rows for wind pollination.