To propagate sweet corn, the most common method is to plant seeds directly in the ground after the last frost, as corn does not transplant well; you can also start seeds indoors in pots for earlier harvest, but be sure to transplant them outdoors once they reach a suitable size and the weather warms up; save seeds from your existing corn plants to propagate new ones by harvesting mature ears and allowing them to dry completely before removing the kernels to store for planting the following season.
Key steps for propagating sweet corn:
- Choose your seeds: Select a variety of sweet corn suited to your climate and desired harvest time.
- Seed saving (optional): If you want to save seeds from your existing corn, cover the ears with a paper bag once the tassels appear to prevent cross-pollination.
Indoor starting (optional):
- Sow seeds in individual pots filled with seed starting mix, about 1 inch deep.
- Keep the soil moist and warm (around 65-70°F) to promote germination.
- Once seedlings have a few true leaves, gradually harden them off before transplanting outdoors.
Outdoor planting:
- Prepare the soil by adding compost or other organic matter.
- Plant seeds directly in the ground, spacing them about 12 inches apart in rows 3 feet apart.
- Plant seeds 1-2 inches deep.
- Water regularly, especially during germination and hot weather.
Important considerations:
- Pollination: Corn is wind-pollinated, so plant several rows close together to ensure good pollination.
- Sunlight: Corn needs full sun to thrive.
- Support: Tall corn varieties may need staking or support in windy conditions.
- Harvesting: Harvest ears when the kernels are plump and milky.