Sweet corn is an annual crop with yellow, white, or bi-colored ears. A long, frost-free growing season is necessary. Here’s how to plant, grow, and harvest corn in your garden. Sweet corn is wind-pollinated, so it should be planted in blocks, rather than in single rows. Early, mid, and late-season varieties extend the harvest, but be mindful: if you miss the optimal harvest time, the corn’s flavor will go downhill fast, as sugars convert to starch.
✅ GROWING CONDITION - Starting corn seeds indoors is not recommended. It’s best to start them directly in the garden so that their roots aren’t disturbed due to transplanting.
✅ KEY FEATURE - Plant seeds 1.5 to 2 inches deep and 4 to 6 inches apart.
✅ GERMINATION RATE - Rows should be spaced 30 to 36 inches apart. Make sure the soil temperature is above 60°F (16°C) for successful germination. (Up to 65°F/18°C for super sweet varieties.) In colder zones, the ground can be warmed by a black plastic cover, if necessary. Plant seeds through holes in the plastic.
✅ REQUIERED FERTILIZER - You may choose to fertilize at planting time; corn is meant to grow rapidly. If you are confident that the soil is adequate, this can be skipped. Water well at planting time.