Judy,
Welcome to the gauge! I have just started playing around with N scale, so can appreciate the effort and skill shown in your pics.
If you, and Val, and Aartwmich are any indicator of the quality women can bring to this hobby, you need to get more of you interested. Competition would give us good ole boys a reason to get off our **** and improve!
Trees, It is a "pig of a job". On the other hand, like any model, the more effort, the better the look. I had a thread called "a tree is "built",, "planted",, "started" which described the building of an O scale tree, which follows the same technique I use for HO scale. It's in scratchin & bashin. The same materials, and techniques can be applied to N scale.
Excellent work, looking forward to seeing more,
Pete