I live in KY, so I'm not sure.
And as for mineral needs I have a salt block outside. It's the red mineral one. They said it'd work for goats, so that's all she has.
She gets a lot of varied foods, too. She gets pasture plus I'm often tossing out scraps for the chickens that she'll munch on. She gets tree leaves, brush, grass, flax seeds, flax grass, all sort's of weeds and dandelions (which are a great source of calcium). I have really high quality pasture grass that she gets free access too. And of course my 'treat' feed is oats, whole corn, sweet feed, and alfalfa pellets mixed all together.
Salt blocks are very hard for goats to eat, they are not bad to have but they really need a good loose mineral that is easy for them to eat.