Keter Manor Outdoor Apex Double Door Garden Storage Shed (6 x 8ft)
A durable and stylish beige and brown garden storage shed perfect for storing garden tools, equipment, bikes, and outdoor essentials. Weather-resistant, low maintenance, and ideal for any garden or allotment setup.
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Should You Start Sweetcorn Indoors or Sow Directly?
Should You Start Sweetcorn Indoors or Sow Directly? The Best Way to Plant Sweetcorn
When planning your sweetcorn crop, one of the first decisions is whether to start seeds indoors or sow them straight into the garden. Both methods have advantages, and the best choice often depends on your climate, growing season, and garden setup.
Starting Sweetcorn Indoors
Advantages:
- Get a head start on the season, especially in cooler climates.
- Beat unpredictable spring weather and minimize seed rot in cold, wet soil.
- Enjoy earlier harvests.
How to Start Indoors:
- Use biodegradable pots or modules to minimize root disturbance.
- Sow one seed 2cm deep per pot, 2–3 weeks before the last expected frost.
- Keep in a warm, bright location (18–21°C/65–70°F).
- Water gently and keep soil consistently moist but not soggy.
- Harden off seedlings for a week before transplanting outdoors.
Considerations:
- Transplant sweetcorn young—plants do not like having their roots disturbed.
- Space plants the same as you would direct-sown seedlings (see our seed guide).
Direct Sowing Sweetcorn Outdoors
Advantages:
- Less transplant shock; roots grow undisturbed.
- Easy and requires less handling.
- Ideal for mild or warm climates with a long growing season.
How to Sow Directly:
- Wait until all frost has passed and soil temperature is at least 10°C/50°F.
- Sow seeds in blocks (not single rows) for good pollination—see our planting blocks guide.
- Plant seeds 2–3cm deep and 20–25cm apart in rich, well-drained soil.
- Water well and keep moist, especially as seedlings emerge.
Considerations:
- Seeds planted too early in cold/wet soil may rot.
- Later starts may result in late-season harvests in short-summer areas.
Quick Comparison Table
| Start Indoors | Direct Sow | |
|---|---|---|
| Frost Protection | Yes | No |
| Harvest Time | Earlier | Standard |
| Germination Issues | Fewer in cold climates | May rot in cold, wet soil |
| Transplant Shock | Risk if roots disturbed | None |
Expert Tip:
If your region has a short or unpredictable growing season, start some sweetcorn indoors and direct sow some as well for staggered, longer harvests!
What’s Best For You?
- Cool/Short Season: Start indoors for a jump start.
- Warm/Long Season: Sow directly as soon as the soil is warm.
- No greenhouse? Use a sunny windowsill or cold frame for early starts.
What’s Next?
Learn about the best sweetcorn varieties for your garden in our next article, or check out our full guide to sowing and spacing for big yields!