Originally Posted by LurkerMom
mine cohabit very well together (2 ghost 3 cherries, getting another one of each soon)
but i heard its not all bettas that are ok with it :)
In your case I'd worry more about the ghost shrimp attacking the cherries, than the betta. Ghost shrimp can get really aggressive... and large (well, by comparison to cherries, at least). Cherries are small, docile... and tasty. They're also brightly colored so a betta that ignores the ghosts will sometimes be more interested in the cherries.