Secondary vine colour
Anthocyanine (purple pigmentation) present in the vines beside the green colour. The predominant colour should be evaluated considering the whole vine from base to tip. The secondary colour is more easily evaluated using younger vines.
| Code | Term | Description |
|---|---|---|
| 0 | Absent | |
| 1 | Green base | |
| 2 | Green tip | |
| 3 | Green nodes | |
| 4 | Purple base | |
| 5 | Purple tip | |
| 6 | Purple nodes |