Having in recent months made up a few hundred puff ball trees using Micro Mark's black fiber and Woodland Scenics turf materials, I'm now debating as to the best method to apply the trees to my layout. I have already put down the base ground material on the surface, but am not sure what to use to attach the balls to the surface. I have used 3M's #77 spray adhesive to create the balls, but I'm not comfortable trying to spray each puff ball as I go in the "planting" process ( very messy and smelly).

I have a question regarding making HO scale puff ball trees. My layout is 90% completed, but for the addition of many trees as found in central Wisconsin. In reading articles from MR and other sources, I have some idea what I need to do, but since I'll be needing a lot of trees, I'm looking for the best source of the poly fiber material in bulk and the foliage material to use ( Woodland Scenics?). I also need some input as to the best way to adhere the foliage as I've read a couple differing opinions. Can anyone help?