First thanks to Surjamte for his mod "Total Tundra Texture Transplant (Green Whiterun Tundra)", it's the base of this new mod.

This mod is STANDALONE, you dont need to download anything else to make it work.
BUT! you should downlad this mod too: 
https://www.nexusmods.com/skyrim/mods/60215?tab=posts
it's to get green LOD (distance view).

Installation: use Vortex, let it work and overwrite anything it asks.

RECOMENDATION:
I recommend to install this mountains:
https://www.nexusmods.com/skyrim/mods/58960
This landscape total edition:
https://www.nexusmods.com/skyrim/mods/77722
This trees (unless you use other nice trees but i use this ones)
https://www.nexusmods.com/skyrim/mods/77330