Problem with Grass Foliage with darker areas

I have stylized grass on my scene but it look’s so darker in the backfaces with the subsurface opacity at 1, it look’s like this:

But the Tree’s and cabin shadows are correct shaded, the problem is with the backfaces of the grass, i try turning down the subsurface opacity to 0 and i get a nice result for the grass but i dont have the tree’s shadows on the grass and is completely lit like this:

I want to get a nice grass color but with shadows, can someone help me with this grass?

This is the Grass material that I am using:

Thanks! Finally i get a better result:

Normally it would be messing around with subsurface. But… have you seen this, it might have something of interest:

Great. Did you do the spherical shader thing?