2700 square feet and ten hens and totally bare. Interesting. I had the same thing (approximately 45' x 60) in Northwest Arkansas and it stayed green in growing season. My year around laying/breeding adult flock was typically around 8 or 9 chickens but in the summer I may have a total of 50 chickens, many chicks growing to butcher size. There were some bare spots where they liked to take dust baths. They would eat the good stuff and leave the bad so I'd have to mow it three or four times a year to knock down the bad and give the good a chance to grow.
I also has a 12' x 32' covered main run that was bare. I'd keep them in there for about a week in the spring when grass was just starting to give it a chance to get ahead. Other than that they had full access to all of it all year.
How much land it takes to support a chicken or any other animal will depend on what plants grow there, temperatures and the season, soil types, how much rain you get, many things. I'd have thought you'd be warmer and wetter than I was in Arkansas so you'd do better. Sounds like I'd be wrong on that.
My 12' x 32' covered main run and he 45' x 60' were both just dirt or grassy turf. They both drained pretty well. The big area would get soggy when is set in wet but not bad with all that grassy area. Not muddy. The 12 x 32 area was bare dirt and would get muddy when rain blew in from the side. It was on a high spot so it drained reasonably well but would get muddy. I dumped a few bags of pea gravel at critical points so I could get around to feed and water out there without getting really muddy but mostly lived with it. It wasn't that bad. But mud is no fun.
2700 square feet is a big area. If ten hens are keeping it bare it will be muddy if water doesn't drain away. Depending on the terrain you may be able to use berms and especially swales to drain it. But that's only if it has some place lower to drain to.
Another thought. Put a fence down the middle of it. Keep them in one side until the vegetation gets growing in the other. Swap them back and forth. Maybe get a hay mixture that includes stuff that grows in your area to seed it. A mixture or Bermuda and clover sounds good to me but I don't know what actually grows in your area. You said you tried something like that but did you reseed it?
If an area stays wet it will be an issue. That's why my main criteria in locating a coop or run is drainage. Everything else can be dealt with.
I also has a 12' x 32' covered main run that was bare. I'd keep them in there for about a week in the spring when grass was just starting to give it a chance to get ahead. Other than that they had full access to all of it all year.
How much land it takes to support a chicken or any other animal will depend on what plants grow there, temperatures and the season, soil types, how much rain you get, many things. I'd have thought you'd be warmer and wetter than I was in Arkansas so you'd do better. Sounds like I'd be wrong on that.
My 12' x 32' covered main run and he 45' x 60' were both just dirt or grassy turf. They both drained pretty well. The big area would get soggy when is set in wet but not bad with all that grassy area. Not muddy. The 12 x 32 area was bare dirt and would get muddy when rain blew in from the side. It was on a high spot so it drained reasonably well but would get muddy. I dumped a few bags of pea gravel at critical points so I could get around to feed and water out there without getting really muddy but mostly lived with it. It wasn't that bad. But mud is no fun.
2700 square feet is a big area. If ten hens are keeping it bare it will be muddy if water doesn't drain away. Depending on the terrain you may be able to use berms and especially swales to drain it. But that's only if it has some place lower to drain to.
Another thought. Put a fence down the middle of it. Keep them in one side until the vegetation gets growing in the other. Swap them back and forth. Maybe get a hay mixture that includes stuff that grows in your area to seed it. A mixture or Bermuda and clover sounds good to me but I don't know what actually grows in your area. You said you tried something like that but did you reseed it?
If an area stays wet it will be an issue. That's why my main criteria in locating a coop or run is drainage. Everything else can be dealt with.