Thanks for your reply! So here’s a screenshot showing how the normals (both world space) don’t match. I basically pointed all the normals of the grass facing up (Z axis).
I am not clear on how to lerp the RVT normals with the grass. Is to be lerped like this?
If I lerp it like that the back of the grass becomes black and still doesn’t resolve the blenging issue unfortunately 
-I would like to add tangent space normals is checked in my materials as well as landscape.