I needed some trees for the set have more detail set so I got some poly-fil and something called “cluster stuff” which looks like very tiny cotton balls. I’m using a flat green interior latex paint for coloring the ground and foliage.
I’m waiting for the paint to dry and will then attempt to put it into place with my tree trunks. For the trunks I got some wire and twisted two strands into a Y shape. I then took the two Y shapes and twisted the bottoms together for a basic tree. I could keep going through a few more iterations to get a more detailed tree but I think this will suffice for my current needs.