Trees and grass.

Hello guys i have been stuck on doing trees and putting in an nice looking grass. Do anyone know how to solve this poblem? It would be of great help!

Have you tried looking at the terrain assets that unity provides?

Control 5, or go to the terrain thing, and there should be seven or eight icons, one of them is paint trees and another is grass, for the grass one choose the grass, not the grass hill, and use that, and paint your terrain with it. Go to terrain settings to adjust how far you can see them from to speed up the game.