Trees are rotating with camera (looks awful)

I am trying to use simple procedural trees on a terrain and I notice that the distant trees (billboard sprites) are rotating with the camera. I can imagine that the intent was to rotate them so as to always face the camera but when I look up or down, so do the trees, and its creepy as hell in VR. I will say that it’s quite discouraging as I am a Unity beginner who has now spent 2+ hours on Google only to realize that there is no conventional means to fix this bug. So I think I have to remove all trees (if that is the case then I don’t see any reason to continue development of my game, at least not with Unity).

Has anyone ever noticed this happening? Is there any way to correct this without having to crank up “billboard start” and watch frame rates diminish to the point of becoming unusable.

The quick brown fox jumps over the lazy dog