It could be possible to exceed fifteen mutations, but we haven't done more than ten yet, to the best of my knowledge. Since each mutation seems to mean simply increasing the range by four points, figuring further would be simple to do. If you have a new vine that you've crossbred, and you don't know how to do all this figuring, /tell Calixes in game, and I'll try to arrange doing it.
Highest Value in Tend Column | Mutation(s) |
0-4 | none |
5-8 | 1 |
9-12 | 2 |
13-16 | 3 |
17-20 | 4 |
21-24 | 5 |
25-28 | 6 |
29-32 | 7 |
33-36 | 8 |
37-40 | 9 |
41-44 | 10 |
45-48 | 11 |
49-52 | 12 |
53-56 | 13 |
57-60 | 14 |
61-64 | 15 |