Growing Sweet Corn
Sweet corn is delicious from the garden—but it needs more space and more planning than many vegetables.
The biggest secret is pollination.
When to Plant
In Central Alabama, sweet corn can generally be planted from March into early summer, depending on variety and weather.
Wait until soil is warm enough for good germination.
Plant in Blocks
Corn is wind-pollinated.
Do not plant one long single row if you can avoid it.
Plant in a block of several short rows so pollen has a better chance of reaching the silks.
Poor pollination leads to ears with missing kernels.
Sun and Soil
Corn needs:
- Full sun
- Fertile soil
- Consistent moisture
- Plenty of room
Corn is a relatively heavy feeder compared with many garden vegetables.
Use soil-test guidance for fertilizer.
Spacing
Allow adequate spacing between plants and rows.
Crowding can create weak plants and smaller ears.
Watering
Moisture is especially important during:
- Tasseling
- Silking
- Ear development
Drought during these stages can reduce yield significantly.
Succession Planting
Plant a new block every couple of weeks for a longer harvest.
You can also choose varieties with different maturity dates.
Pollination Timing
The tassel releases pollen.
The silks receive it.
Each silk corresponds to a kernel.
If silks are not pollinated, that kernel does not develop.
Common Problems
Watch for:
- Corn earworms
- Fall armyworms
- Japanese beetles
- Stink bugs
- Birds
- Raccoons
Home gardeners often discover that wildlife knows exactly when corn is almost ready.
Harvest
Sweet corn is best harvested when kernels are plump and milky.
Check ears when silks turn brown but husks remain green.
Quality drops after harvest, so refrigerate promptly.
GardenGrowz Tip
Grow corn only if you have enough room for a block planting. In a tiny garden, other crops usually produce more food per square foot.
