Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download Desktop Ground Cover Package 2 Free.
Desktop Ground Cover Package 2 v1.0
These SpeedTree models feature seamless LOD transitions and scalable wind effects that work in Unity out of the box. Package includes:
•Nine species of ground cover in desktop resolution.
• 128 high-res diffuse/normal/specular maps.
•2 leaf map maker SPM files (details).
Create limitless variations of each model or design something completely new with a $19 USD/month subscription to the SpeedTree Modeler.
(Scalable wind effects not currently compatible with Unity HDRP)
What makes SpeedTree models more than just a mesh? Click here or see the video below.
User License: Use of this product is subject to the terms of the SpeedTree Model Library Component End User License Agreement