Sweet Corn Planting Calculator
Sweet corn plants, ears, and dozens from block rows.
What it does
Sweet corn pollinates by wind across blocks. Four or more short rows fill ears far better than one long line.
The tool above multiplies rows by row by spacing. Four rows of forty feet plant 160 stalks for 160 ears, or 13.3 dozen. The metric match is 12.2 m rows for the same 160.
One ear per stalk plans harvests. Good pollination fills kernels tip to base while lonely rows gap.
Blocks beat lines. Wind crosses neighboring stalks in blocks, with succession sows stretching picking weeks.
Raccoons calendar harvests too. Night patrols beat morning surprises.
How to use
- Pick imperial (ft) or metric (m).
- Enter row count and length.
- Read plants first.
- Read ears next.
- Read dozens and plant blocks.
Formula
- rows
- Row count in the block.
- row
- Row length.
Blocks beat single rows for wind pollination. Metric uses 30.5 cm spacing with matching counts.
Worked example
Example: 4 by 40 ft block
Imperial defaults: 4 rows of 40 ft. These are also the default values, so the page opens on this answer.
- Patch: 4 rows of 40 ft at 12 in spacing.
- Plants: round(4 x 40 x 12 / 12) = 160 plants.
- Ears: 160 x 1 = 160 ears.
- Dozens: 160 / 12 = 13.3 dozen.
- Tool shows 160 plants, 160 ears, 13.3 dozen.
Reference table
| Block | Plants | Ears |
|---|---|---|
| 2 by 20 ft | 40 plants | 40 ears |
| 4 by 40 ft | 160 plants | 160 ears |
| 6 by 10 ft | 60 plants | 60 ears |
Limits
- Count math only. Pollination rules fill.
- Drought at silking gaps kernels.
- Raccoons tax unguarded blocks.
- Varieties mature at different paces.
Common mistakes
- Single long rows pollinating poorly.
- No succession, one glut week.
- Skipping water at silking.
- Harvesting past milky kernels.
- No raccoon plan at all.
Try it yourself
Quick checks. Answers sit tucked under each question.
2 rows of 20 ft?
round(2 x 20 x 12 / 12) = 40 plants. Ears are 40. Dozens are 40 / 12 = 3.3 dozen after rounding (3.3333).
6 rows of 10 ft?
round(6 x 10 x 12 / 12) = 60 plants. Ears are 60.
Questions
Plants?
Multiply rows by row inches over spacing. Here round(4 x 40 x 12 / 12) = 160 plants.
Ears per stalk?
One ear per stalk in this plan. Blocks pollinate better than single rows.
Dozens?
Divide ears by 12. Here 160 / 12 = 13.3 dozen.
Block or row?
Four or more short rows beat one long row for wind pollination.
Succession sowing?
Yes. Succession sows every two weeks stretch harvests.
Raccoon proof?
No. Raccoons harvest the night before gardeners.