Starting Seeds Indoors: The Complete Walkthrough
This guide covers starting seeds indoors, rated an easy task, typically taking 15–20 min/tray.
Starting Seeds Indoors is a genuinely useful skill for most homesteads. Here's the complete picture behind our one-page printable guide.
Sow at the right depth
A good rule of thumb: sow seed roughly twice as deep as the seed is wide. Too deep and it can't push through; too shallow and it dries out before germinating.
Getting Set Up
Worth paying attention to:
- Seed-raising mix (not garden soil — too heavy and can carry disease)
- Trays or punnets with drainage holes
- A warm, bright spot or a heat mat
- Plant labels
- A spray bottle or gentle watering can
How It's Done
Keep these points in mind:
- 1. Fill trays with moistened seed-raising mix, level but not compacted.
- 2. Sow seed at the depth given on the packet — as a rule, roughly twice the seed's width.
- 3. Mist gently to settle the mix without dislodging seed.
- 4. Keep consistently moist and warm; cover loosely with plastic to hold humidity until germination.
- 5. Move to bright light the moment shoots appear — leggy seedlings mean insufficient light.
Troubleshooting
Worth paying attention to:
- Damping off — seedlings collapse at the base; improve airflow, avoid overwatering, use fresh mix each time.
- Leggy, stretched seedlings — insufficient light; move to a brighter spot or add a grow light.
- No germination — check the mix hasn't dried out, or that seed wasn't sown too deep.
- Mould on the surface — too damp and still; increase airflow, ease off watering.
Ongoing Timing
Best time: 6–8 weeks before your last expected frost, or per the seed packet's guidance for your climate. Duration — most vegetables are ready to transplant 4–8 weeks after sowing. Maintenance — check moisture daily; seedlings dry out fast in small cells. Signs of success — sturdy stems, true leaves (the second set) developing, and root tips just visible at drainage holes.
For the condensed printable version, head to the main guide page linked below.