The bases are made with twopart Miliput. Either standard or terracotta. Press textures in with a rough stone or broken eice of concrete. The weeds are railway modeling horsehair. they come in a number of colours, but what the hey, you are going to paint them afterwards anyway. The forrets floor humus is a special flock, but mixed herbs work just as well. The tree stumps and logs are twigs I have found over the years.