How long it takes to re establish grass seems to be dependant on a number of things, depending on your location, soil, rainfall etc. Mine has been a couple of years, but I never reseeded it, and it gets little water. It is “getting there” this year. It is being taken over by “cootch grass”, which is endemic here, and I like it for this purpose. I don’t think that you can buy cootch grass seed, most people spray it to kill it on their property LOL. The mat of roots is thick, and indestructible, and drought tolerant. Since we are so dry in the summer, I like the grass because of less dust than what was happening with just the rototilled dirt. And yes, the grass may well be torn up at times, but if it is just your own private riding ring, this won’t be too much of an issue. My horses are barefoot, so less tearing up than with shoes. Our weather here is so dry, it is true “horse country”, all my TB horses have feet like iron, don’t need shoes any more.
Streamline, I so agree with the fancy expensive footing. So much work to keep it in shape, watering, grooming twice a day etc. So nice to have a fleet of workers being paid a wage to work the footing in your ring. Not in my reality. And so many injuries on this footing when it is not kept in optimum shape. My only education on footing for athletic horses comes from racetracks, where a firm draining base is underneath it all, and a combination of sand, clay and organics makes up the cushion. The sand for “grit” and traction, the clay to compact and “hold” the foot so that the footing is not “cuppy”, and organic for spring and to hold water. What may be used as “organics” is dependent on what is available in your area. Then water it and work it to keep it functional. It is important that the footing returns energy to the horse’s leg in each step, is not slippery, is not cuppy (breaking away under each step), not deep, not too hard. I can only control these things in my indoor arena. In my situation, the outdoor arena is best to be grass, IMO. I have been advised to “just order up some sand” for my outdoor arena, but this, IMO, would just result in a sandbox, and not what I am looking for in an outdoor arena.