Guides ยท Science
Greenhouse Seed Starting Basics
Start seeds successfully in a small greenhouse
This guide covers choosing seed trays and mix, managing temperature and humidity, providing light, and hardening off seedlings before transplanting.
- seed starting
- greenhouse
- germination
- humidity
- gardening
Prepare trays and mix
Use clean trays with sterile seed-starting mix; moisten before sowing.
Control heat and humidity
Keep most seeds near 70-75?F and use domes briefly; vent to prevent mold.
Provide strong light
Place under grow lights 14-16 hours daily; keep lights a few inches above seedlings.
Harden off before planting
Gradually expose seedlings to outdoor conditions over 7-10 days.