Thanks - I used some kids sandpit sand, added some budgie grit for the stone look (cheap at £0.49p), sprinkled a little brown coloured scatter and then some small pieces of green lichen for weeds.
I am currently having a tile 5"x5" of cornstalks made (will need about 4 of these to do what I want on my diorama).
What I hate about my diorama is that I am using a sandpaper green roll for grass.
I want some good realistic looking grass, I think this lets it down at the moment.
The attachment looks good for the area I need to cover just need to source a seller in the UK (which is proving harder than you might think)!!