Why the shadows of my trees are very dark compared with the rest of scene?

Hi everyone!
Hope you can help me. I’m learning Unity. I made a simple scene with terrain, trees, grass and some water.
Here is the issue:
The shadows of my trees looks very dark, compared with the rest of my scene. As you can see, the cube shadows looks normal, also the grass shadows looks good.

P.S: If i place a point light, the shadows become lighter: (I cannot attach other screenshot because i’m new user in the forum)

Thank you for reading! Sorry for my english, i’m from Argentina :slight_smile:

Maybe turn up the ambient light I lighting settings - Environment?
Or bake reflection probes or lighting