My patio and walls has turned green?
I went out onto my patio this morning and have noticed that the patio and walls in the garden have turned a mossy green and I have tried to sweep it and it makes no difference, is there anything I can do to get rid of this?

This can be a fun job to resolve. Get a power hose ensuring that you have waterproofs on. Had to do this job for my Mum and it was amazing how quickly the power hose got rid of it all. The thing is it will reappear but at least you will then have the experience of knowing what to do.