Posted: Sun Mar 19, 2017 5:24 am
by Rand
A local nature center for the Darby Creek Metropark has a green roof. I took one look and wondered how they keep the cottonwoods out of it. I asked about it, and they have a person who weeds/maintains it just like a regular flower garden. So nice, I suppose, but probably not economical for widespread adoption.

Lucas wrote:I am all for this but trees, soil, water and concrete seldom get along. It going to need some testing.

Your 'tree towers'give me the same reaction. Just how long before dampness and tree roots obliterate those nice, lust balconies? That last waterproof membrane must be laid down with meticulous care.

I'm beginning to get the impression that the most important part of a tree is actually underground.