0 Members and 1 Guest are viewing this topic.
Measure the girth of the tree about 150cms form ground level.
A core sample shouldn't really harm a tree, should it? It only makes a small hole in the bark so only a minute amount of cambium is destroyed and the heartwood doesn't conduct anything anyway and it won't reduce the trees strength significantly either. The biggest danger is from infection, so the hole needs covering until healed - or so I understand.