On Thu, 23 Apr 2009 09:54:46 +0100, Sacha wrote:

Stephen Wolstenholme wrote:

I wish I knew the secret of growing green covering on rocks. Moss
would be wonderful. It looks much better than just rock!

Steve

Have you done the yoghurt or sour milk trick?

I have tried yogurt but not sour milk. What's the difference

Steve