Lichen, liverworts and moss.

Having recently admired plants renowned for their beauty or magnificence, I'd like to touch upon some of slightly humbler standing. I love their ability to soften the appearance of a garden feature.

Lichen, liverworts (Marchantiophyta), moss.
(Ephemeral or perennial.)

Aspect: Shady, humid or wet.
Hardiness: Fully hardy.

Notes: One recommended method of encouraging growth is to apply a weak yoghurt solution on to a surface.

I have been seeking a way to disguise the plastic lining at the edge of my pond- perhaps covering it in yoghurt might create a natural-looking layer of moss? I shall certainly try, watch this space!