Corn
Zea mays
family
Poaceae
Difficulty factors: Temperature sensitive
duration
Annual
growth habit
Forb
why learn this plant?
Corn teaches fundamental vegetable growing skills including soil preparation, watering consistency, and harvest timing.
timeline
germination
7-14
days to maturity
60-100
growth stages
Germination/Establishment
1-2 weeks
Seeds swell and sprout, or transplants establish roots
Check in:
Look for first signs of green growth emerging from soil
Tasks:
- Keep soil consistently moist
- Maintain temperature
- Protect from strong wind
Watch for:
- Damping off from overwatering
- Poor germination from old seed
Seedling
2-4 weeks
True leaves develop, stem strengthens
Check in:
Count true leaves — ready for transplant at 2-4 sets
Tasks:
- Thin seedlings if direct-sown
- Begin light fertilizing
- Harden off if started indoors
Watch for:
- Leggy seedlings from insufficient light
- Transplant shock
Vegetative Growth
3-8 weeks
Rapid leaf and stem growth, plant fills out
Check in:
Plant should be growing visibly each week
Tasks:
- Regular watering
- Fertilize on schedule
- Add support if needed
- Watch for pests
Watch for:
- Nutrient deficiency (yellowing leaves)
- Pest damage
Flowering/Fruiting
2-6 weeks
Flowers appear, followed by fruit development
Check in:
Note first flower date — track pollination success
Tasks:
- Ensure pollination
- Continue consistent watering
- Side-dress with fertilizer
Watch for:
- Blossom drop from heat stress
- Poor pollination
Harvest
2-8 weeks
Fruits ripen, ready for picking
Check in:
Check daily at peak — many crops taste best picked slightly early
Tasks:
- Harvest regularly to encourage production
- Record yield
- Watch for overripe fruit
Watch for:
- Splitting from irregular watering
- Pest damage to ripe fruit
how to grow
starting method
direct sow
sun requirements
Full sun
spacing
8-12 inches" × "8-12 inches"
planting depth
1-2 inches
water needs
Frequency: Every 2-3 days
Amount: 1-1.5 inches per week
Method: Drip irrigation or soaker hose preferred. Water at base, avoid wetting leaves.
soil & fertilizer
Amend with compost. Preferred pH: 6.0-7.0. Soil type: Well-drained, fertile soil.
At planting: Balanced 10-10-10 or compost
During growth: Balanced fertilizer every 3-4 weeks every Every 2-4 weeks during growing season
zone timing guide
Best grown when temperatures are 60-80°F. Plant after last frost in spring.
Zone 3
Start indoors: April
Transplant: Late May-June
Short growing season, choose early varieties
Zone 4-5
Start indoors: March-April
Transplant: May-June
Direct sow: May
Zone 6-7
Start indoors: February-March
Transplant: April-May
Direct sow: April-May
Zone 8-9
Start indoors: January-February
Transplant: March-April
Direct sow: March
Zone 10+
Direct sow: February-March
Year-round growing possible
harvest guide
Visual cue
Silks dry and brown, kernels plump and milky when pierced.
Feel
Firm but not hard. Should separate from plant easily.
Timing
Typically 60-100 days from planting
Storage
Store in cool location. Use within 1-2 weeks for best quality.
what can go wrong
Overwatering
Visual cue:
Yellowing lower leaves, mushy stems, mold on soil surface
Why it happens:
Too frequent watering without checking soil moisture
Prevention:
Check soil moisture before watering — stick finger 1 inch into soil
If it happens:
Allow soil to dry out between waterings. Improve drainage.
Insufficient light
Visual cue:
Leggy, stretched growth with pale leaves
Why it happens:
Planted in too much shade or crowded by other plants
Prevention:
Ensure at least 6-8 hours of direct sunlight
If it happens:
Transplant to sunnier location or thin surrounding plants
skill progression
companion planting
related plants
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