Comment by qrios
9 hours ago
Thanks for sharing! I had no idea about the “3-30-300 test,” even though I always pay attention to city trees.
I can, however, easily explain the division in Europe: In Italy (for example, in Palermo), the vigorous growth of many species very often leads to significant damage to infrastructure.
Here in Vienna, there’s a directory of trees[1] where you can see, among other things, the species and age.
As Alex Shigo likes to point out, it's too easy to try and explain infrastructure damage in terms of trees, while giving expansive soils a free pass.
That's like explaining frost-jacking of a wall in terms of temperature instead of hydrology.