Trees, man. Trees.

[Moros]

I started a map in a different style than my other one (so I can see which I like better). But I've encountered a slight problem, and would appreciate some advice on the subject. I have no idea where to stop adding detail to trees in a forest. I start not drawing detail too soon and it looks like the trees have no leaves, start too late and it makes the whole perspective like off. Help

Any advice or personal anecdotes about this problem would be appreciated