| Species | Code | Germination Time | Optimal Temp | Notes |
| Capsicum annuum | A | 7-14 days | 75-85°F (24-29°C) | Standard; fast and reliable with warmth |
| Capsicum chinense | C | 10-21 days | 80-90°F (27-32°C) | Slow to germinate; needs high consistent heat |
| Capsicum baccatum | B | 10-18 days | 75-85°F (24-29°C) | Moderate speed; prefers moist warmth |
| Capsicum pubescens | P | 14-30 days | 70-80°F (21-27°C) | Slow; cooler temps preferred, pre-soak seeds |
| Capsicum frutescens | F | 10-20 days | 80-90°F (27-32°C) | Similar to chinense; needs warmth and moisture |
| Capsicum praetermissum | D | 14-25 days | 75-85°F (24-29°C) | Wild type; erratic but responsive to bottom heat |
| Wild types (e.g. C. chacoense) | W | 14-30+ days | 75-85°F (24-29°C) | Often need pre-treatment; slow and variable |