custom 3D grass

Hello there, i have my own 3D model for grass, but the animation wont work.

I have really low experiences with unity so. i did it 100% wrong.

i just created 3D model, i gaved animator, and script if that grass will be slower or faster (this script work good) and my next step was this

alt text

and i can add that grass as tree wich is stupid and this will be problem a believe.
also i tried change material for nature/***
and this just happen

alt text

So, my question is. Can i add my custom grass with my own animation to my world ? is this even possible ? thanks for answer.

alt text

just for showcase x)