Growing Corn in Australia: The Complete Guide
Corn is an easy to moderate grain & staple to grow, needing full sun with regular, especially at tasselling watering.
We get asked about corn often enough that it's worth setting out the full picture here, beyond what fits on our printable card.
Plant in blocks, not rows
Corn is wind-pollinated, so a single long row often pollinates poorly. Plant in a block of at least 4x4 plants so pollen reliably reaches neighbouring silks.
Getting Corn Into the Ground
Method — direct sow in a block for reliable pollination. Soil — rich, well-drained, heavy feeder. Timing — sow after frost risk passes and soil has warmed.
Day-to-Day Care
The key things to get right:
- Water deeply and consistently, especially while tasselling and filling cobs.
- Feed generously — corn is a heavy nitrogen feeder.
- Hill soil slightly at the base for stability in wind.
- Hand-pollinate by shaking tassels over silks if pollination looks poor.
Common Problems
A few things matter most here:
- Corn earworm — larvae in developing cobs; check tips regularly.
- Poor pollination — planted in a single row; always plant in blocks.
- Lodging (falling over) — wind damage; hill soil and shelter if exposed.
- Birds and possums — net or fence ripening cobs.
When and How to Harvest
Signs — silks have browned and dried, kernels release a milky liquid when pressed. Method — twist and pull the cob downward from the stalk. Curing — none needed for sweet corn — eat promptly, sugars convert to starch quickly after picking. Storage — fridge only a day or two; best eaten the day it's picked.
That's the full picture behind corn. The printable A4 version of this guide — with the quick-reference gauges and diagram in one page — is available on the main guide page below.