Kickstart slow growers with steady warmth and light. This practical February guide shows the exact kit, temps, and workflow to get robust seedlings ready for spring planting.
Why February?
- Rising light levels but still‑cool homes/greenhouses
- Long season crops need earlier starts to crop well
- Controlled heat avoids cold‑shock and damping‑off
Related: What to sow in February
The Propagator Setup (Step‑by‑Step)
- Fill trays with fine seed compost; pre‑moisten.
- Sow thinly (tomatoes 0.5 cm deep; peppers/chillies on the surface and cover lightly).
- Set heat: 20–25°C for chillies/peppers/aubergines; 18–22°C for tomatoes.
- Vent and wipe daily to prevent condensation and fungal issues.
- Light: bright south window or LED grow lights 12–14h/day.
- Prick out when first true leaves appear; pot on promptly.
- Harden gradually in a cold frame once nights improve.
See category hub: Heated Propogators in February
Beginner route: Plug Plants
Troubleshooting
- Leggy seedlings → raise light, drop heat after germination.
- Damping‑off → better airflow + sterile trays + bottom‑watering.
- Slow peppers/chillies → higher base temp (23–25°C) and patience.
Shop essentials: Heated Propogators
FAQs
Do I still need a propagator if I have a warm airing cupboard?
Yes—seedlings need light immediately; move to a lit propagator at first hook.
When do I turn the heat down?
Once most seeds germinate, reduce to ~18–20°C and increase light.
Which crops are not suited to heat now?
Cool‑season greens (lettuce/spinach) germinate well in cooler trays.
Call to Action
Build your spring harvest now with steady heat and strong light.
Explore: What to Sow In February Vertical Gardening
