Hi Chris
Used various mininatur tuft grasses and then some moss I found in my garden and dried out.
Its a win win because I clear my lawn of moss and get to use it for my models!
I find that real mosses scale well and don't lose their colour. I've got some I picked 18 months ago which still look the same now as they did then.
The mininatur range is excellent with different colours for different seasons and a large variety of grasses
Cheers
Leigh