The Scientific Name the formal name for the plant. The scientific name is supposed to be the formal name universally worldwide. We try to find the one that is the most consistent with the world and still makes sense. (California seems to make up their own names sometimes.)
| 5a | -20 to -15 F |
| 5b | -15 to -10 F |
| 6a | -10 to -5 F |
| 6b | -5 to 0 F |
| 7a | 0 to 5 F |
| 7b | 5 to 10 F |
| 8a | 10 to 15 F |
| 8b | 15 to 20 F |
| 9a | 20 to 25 F |
| 9b | 25 to 30 F |
| 10a | 30 to 35 F |
| 10b | 35 to 40 F |
| 11 | Above 40 F |