You should work more on the normals instead of just auto generating them with the same settings.
The Saintpaulias looks really strange for example, they should have smooth, thick, fuzzy leaves, not wrinkly uneven ones like yours. And certainly not as shiny.
Most of your leaves seems to be way to wrinkly. Unless they’re sallad or something most green foliage is fairly smooth.
Also you might want to write what polycount they have, when it comes to foliage, polycount is usually very important.