Is it possible to generate trees and plants on custom mesh (planet)

I’m making a space exploration game, and I made a planet with procedural terrain on it. How can I make trees and plants procedural generate on planet? (Sorry for bad english)

The Asset Space Graphics Toolkit (SGT) has Terrain Prefab Spawner. That means you can Spawn on the Planet Object like Trees, Plants, Cities etc… The Asset Costs 101,24 USD.