Few kinds of fantasy plants for your project. Each kind of plants have few different meshes. Grayscale vertex color for your ability to animate wind by shader.
Triangles counts (aproximately):
Plants 1 - 4370 tris
Plants 2 - 3010 tris
Plants 3 - 2600 tris
Plants 4 - 3040 tris
Plants 5 - 1070 tris
Plants 6 - 1130 tris
Plants 7 - 1170 tris