12 Reasons Your Seeds Fail to Sprout --- and Foolproof Ways to Fix Them
2. How Soil Temperature Affects Germination
Soil that's too cold or too hot can stop seeds from sprouting.
Optimal Temperatures:
- 🌱 Warm-season crops: 70-85°F (21-29°C)
- ❄️ Cool-season crops: 45-70°F (7-21°C)
Fix it:
Use a soil thermometer
Warm soil: row covers/heating mats
Cool soil: shade/light watering
| Crop Type | Temperature Range | Solution |
|---|---|---|
| Tomatoes/peppers | 70-85°F (21-29°C) | Use cloches |
| Lettuce/spinach | 45-70°F (7-21°C) | Morning watering |