Firstly, I have thrown grass seed on the still bare patches, my theory is that it is still warm enough to germinate, unlike the summer, when I had to water it three times a day, and it still wasn't successful
Secondly, some of the concrete pavers, never get the sun, and have now gone completely black
I very nearly slipped a few days ago on them. It smells dreadful, like rotting seaweed, so I have applied some wet and forget.
I haven't used rocket science for either of these applications, grass seed just thrown around, and the dilute probably not accurate. But time will tell ! At least I have done these tasks which I have been putting off.
PS: what makes the pavers go so black, is it lichen or just muck ? Mrs Bouquet