0 | Tree dead or dying |
1 | Tree growth seriously affected, dead branches, discolored foliage, sparse crown |
2 | Tree growth visibly affected, no shoot growth, discolored foliage |
3 | Tree appears healthy but stagnating, little or no shoot growth, crown appears largely dense and without discolored foliage |
4 | Tree appears healthy and in growth, annual shoot growth less than 30 cm (12 in) |
5 | Tree appears healthy and growing vigorously, annual shoot growth exceeding 30 cm (12 in), high crown density and no signs of discolored foliage |