I was walking through a local craft store after Christmas and happened onto their clearence area with all the Christmas leftovers. I happened onto a fake evergreen garland.
It was a $1.50 and it occurred I could use the sprigs for making trees for 3/6mm or small trees and brush for 15mm. You will need a few things, wire cutters to remove the sprigs from the garland. Something to base them on, I used fender washers and something to make the foliage adhere to the washer.
I used Milliput for the adhesive and it made a little contour on the washer. I also paint my washer black. I think when they are plain steel, the washers stand out too much Just put a small amount of Milliput on each washer and start sticking those sprigs. I then applied glue and dipped the base in flocking.
The following photo is the result of less then an hours work. Also the photo that I took of the garland had all of the trees that I made and then some. I ran out of Milliput. I think I can get two to three hundred trees out of the garland.