I am going to build an outdoor arena, and was thinking of a sand-mix, but now am wondering about grass...
I've always been under the impression that grass arenas tend to be hard (and cause strain on joints), as the ground underneath gets stamped hard under all the hoof-action.
Is it possible to have a grass arena where the ground doesn't get too hard on their joints? Do you have to grow the grass a certain way, thickness, lushness? Water it often? A certain type of grass? NOT ride on it in certain conditions?
Is it less or more work to maintain than a sand-based arena?