I've made forests instead of trees. Too many to do individually, modelling woods where the trunks are < 20 feet apart and foliage is solid, not open woodland at all. Cut 3" pieces of various gauge wire spray painted gray, drilled holes and glued those and river birch twigs for the trunks. Then added dirt and chopped dried leaves for forest floor, plus twig bits for fallen timber. Then batting painted black across the top, then glued on WS clusters and coarse grass. Getting the clusters to stay on the edges of the batting until the glue dries is the hard part.
Added some of my recycled WS trees too, and I have a box of super trees for foreground work - winter project.
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