A couple of grandkids were here for my birthday weekend in mid-September. They like to help out a little on the layout and making trees seems to be an area of interest! We might have a forest after the next visit. . . .
Grape vines, netting, hair spray, and a couple of ground turf sizes/colors make a good start:
Hmm, may need a few more, but that will give us something to do for the next visit. . . just as we figured.
A side view. . . showing at least one tree needs straightening, but the whole area needs some ground goop!