by oldclaypaws » Fri Sep 25, 2015 11:51 am
If I have a old oak on its way out with a thin canopy, the ivy has the light to be able to grow right up to the top of it. If you have a healthy oak with a good canopy, the ivy only goes half way up. The ivy is an indicator of the trees condition, it doesnt kill it and just cos you see it on old trees doesn't imply its killed it, the tree died first.
Its good habitat, gives food for birds from the berries in the winter and should be left. Thats the advice of the FC. Timber guys don't like it and will remove it as it makes felling and milling more time consuming, but I find it fairly easy to take off a fallen tree, it almost peels off.
Ash is the exception, it has an open habit and can get swamped by ivy, so I chop it at the base. Ivy is an important part of the ecology and should largely be tolerated.