You can order it now - for fall shipping - from several places online: Irish Eyes, Territorial, Johnny's, etc. just to name a few. Other vendors will likely start accepting orders within the next couple of weeks.

As to varieties I like German White for storing but there are literally hundreds of varieties that are good.

Best to learn the basics about the 5 basic types - hard neck, soft, neck, turban, etc. before choosing some to try and you can learn all the basics and read about many of the varieties at Gourmet Garlic Gardens. Great info and order site both.

Dave

Here is a link that might be useful: Gourmet Garlic

You can buy regular organic garlic in your grocery and it'll do fine. Just plant the cloves about 2-3" deep and about 3 inches apart in the mid - late fall.