Last night I completed the first 4 of the new temperate deciduous trees using Woodlands Scenics trees. They look good but are fragile.
The bases are made with the same methods as the pine/fir trees.
To ensure they stay put I drill a hole in the bottom and insert a paper clip and snip it off. I then drill a hole in the base of the MDF and superglue the tree in place.
I will probably need at least another dozen of these when I get round to it...