Hi eric, I don't think that most rendering programs have much of a focus on making it easy to include vegetation... So you may not really have a whole lot of other options really.
That particular program has a lot of focus on generating natural scenes and vegetation, if nice looking trees that can be set up easily is a big priority then you might want to check that particular one out.
If you have octane, you should use it. In our office we own both octane and vray,and for works like that octane works better. Download some free 3d plants and make yourself a little library with ready-to-use trees with octane materials!
