In ArmA3 it is not possible to place objects like trees, bushes, rocks or plants without using a custom mod. As far as I found out this is because those objects have no className (hope I understood that right) which is needed to place them in the editor.

I can not understand why nearly every object in the game (even pencils -.-) can be placed but trees can not.
Most of my ideas for new towns, places and even for missions can not be realised because of those objects missing.

Hope this can be solved somehow.