Rockery with a Difference!!

Most trees grow from 'terra firms'. These are growing out of the rocks. It is surprising how they manage to do that, but perhaps there is more earth there that we can see!!
Thought about this for Silly Saturday, - but that would have been about 7.50 am when I was going for the paper, and I slid down our drive, and then down the road on the black ice. Luckily I stayed upright! :)