When to Plant Sweet Corn in Melbourne — Cool Temperate Guide
Photo: Wikimedia Commons
Sweet corn is a warm-season grass requiring block planting for wind pollination. Freshly picked corn is dramatically sweeter than shop-bought because sugars convert to starch within hours of picking. Requires significant space (minimum 4x4 block) and cannot be grown as single plants or rows.
Current Growing Conditions
Soil temperature: 21.9°C (optimal range: 16–35°C) ✓ Ready to plant
How to Grow Sweet Corn in Cool Temperate Australia
When to Plant
November to December.
- Soil
- Deep, fertile, well-drained soil enriched with compost and aged manure. Heavy feeder.
- pH Range
- 5.8-7.0
- Sunlight
- Full sun (minimum 8 hours). No shade tolerance.
- Spacing
- 30cm apart, 60cm between rows
- Watering
- Deep water 2-3 times weekly. CRITICAL: increase at tasselling/silk stage - water stress causes bare cob patches.
Companion plants: Beans (Three Sisters), Pumpkin/Squash, Cucumber
Avoid planting near: Tomato (shared corn earworm)
Cool Temperate Growing Tips for Sweet Corn
Recommended Varieties
- Golden Bantam (70 days)
- Early Chief
- Early Gem
Key Challenges
- Short season
- Cool nights
Pro Tips
- Early varieties (70-80 day)
- Start indoors October
- Black plastic mulch
Harvesting Sweet Corn
When ready: Silks brown/dry. Cob full and firm through husk. Kernel exudes milky juice when pierced with thumbnail (milk stage).
How to harvest: Grasp cob, snap downward while twisting. Eat immediately - sugar converts to starch within hours.
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