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Corn Growing Guide
Poaceae family
Days to Harvest85 days
SunlightFull Sun
Frost ToleranceNone
Spacing4/sqft (6" apart)
Germination5-12 days
HardinessTender
Germ. Temp80°F
Companion Planting
Avoid Planting Near
TomatoesGrowth Stages
- Seedling
- Vegetative Growth
- Flowering
- Fruiting / Harvest Ready
Planting Dates by Zone
| Zone | Start Indoors | Transplant | Direct Sow | Harvest |
|---|---|---|---|---|
| Zone 1a | — | — | Jun 1 | Aug 25 |
| Zone 1b | — | — | Jun 1 | Aug 25 |
| Zone 2a | — | — | May 22 | Aug 15 |
| Zone 2b | — | — | Jun 1 | Aug 25 |
| Zone 3a | — | — | May 29 | Aug 22 |
| Zone 3b | — | — | May 22 | Aug 15 |
| Zone 4a | — | — | May 12 | Aug 5 |
| Zone 4b | — | — | May 8 | Aug 1 |
| Zone 5a | — | — | May 5 | Jul 29 |
| Zone 5b | — | — | May 5 | Jul 29 |
| Zone 6a | — | — | May 5 | Jul 29 |
| Zone 6b | — | — | Apr 22 | Jul 16 |
| Zone 7a | — | — | Apr 22 | Jul 16 |
| Zone 7b | — | — | Apr 17 | Jul 11 |
| Zone 8a | — | — | Apr 12 | Jul 6 |
| Zone 8b | — | — | Mar 29 | Jun 22 |
| Zone 9a | — | — | Mar 27 | Jun 20 |
| Zone 9b | — | — | Mar 17 | Jun 10 |
| Zone 10a | — | — | Feb 27 | May 23 |
| Zone 10b | — | — | Feb 4 | Apr 30 |
| Zone 11a | — | — | Feb 4 | Apr 30 |
| Zone 11b | — | — | Jan 22 | Apr 17 |
| Zone 12a | — | — | Jan 8 | Apr 3 |
| Zone 12b | — | — | Jan 8 | Apr 3 |
| Zone 13a | — | — | Jan 8 | Apr 3 |
| Zone 13b | — | — | Jan 8 | Apr 3 |
Frequently Asked Questions
How long does it take to grow Corn?
Corn takes approximately 85 days from planting to harvest.
How much sun does Corn need?
Corn requires full sun (6+ hours direct sunlight per day).
How far apart should I plant Corn?
Plant Corn at 4/sqft (6" apart) using square foot gardening spacing.
Can Corn survive frost?
Corn is frost-sensitive and should not be exposed to frost.
What are good companion plants for Corn?
Good companion plants for Corn include Beans, Squash, Cucumbers, Peas, Pumpkins. Avoid planting near Tomatoes.
How long does Corn take to germinate?
Corn seeds germinate in 5-12 days at an optimal temperature of 80°F.
Growing Tips
- Plant in blocks of at least 4 rows for good pollination
- Provide 1 inch of water per week, especially during tasseling and silking
- Side-dress with nitrogen when plants are knee-high
Common Pests & Diseases
- Corn earworm
- European corn borer
- Raccoons
- Smut
Harvest Notes
Harvest when silks are brown and dry and kernels release milky juice when punctured. Sugar converts to starch quickly after picking.
Plan Your Corn Garden
Track Corn from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.
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