^^^ good information
That was my problem with so many of the "Horse Mixes" you can get at supply stores. They contain sort of blanket grasses like orchard that supposedly will do well in my area but in reality do not.
Again, I think the best bet is to contact your county agent, get that soil test done and have them recommend the best plan for your area and pasture use.
Good luck with it, just remember it does take time. You might want to set up a sacrifice lot while you are getting your grass established as well.
I have a soil test done every year and fertilize accordingly.