Sweetcorn produces tall plants with cobs of sweet kernels, best eaten fresh.
When to Sow
- Sow Apr–May indoors.
- Transplant Jun outdoors or into tunnels.
How to Grow
- Plant in blocks for wind pollination, spacing 40cm apart.
- Water well in dry spells.
- Feed with high-nitrogen fertiliser.
Harvesting
- Harvest Aug–Sep.
- Kernels ready when they release milky juice when pressed.
Polytunnel Growing Tips
- Tunnels improve warmth and cropping reliability.
- Protects from wind damage.
- May need hand pollination indoors.
Quick Tips Recap
- Sow: Apr–May
- Spacing: 40cm in blocks
- Harvest: Aug–Sep
Polytunnel advantage: Reliable ripening, wind protection
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