Questions answered
Driving around Norway we've seen plenty of houses (and bus stops and letterboxes for that matter) with grass growing on the roof. Makes plenty of sense from the insulation perspective, but the question remains, would you have to mow your roof?
Walking around the residential backstreets of Trondheim, I emerged from the end of a leafy walkway up a hill, turned to the left and had that question answered for me:
Yes. Yes you do.
If it were me, I'd just buy a mountain goat and sit it up on the roof.