The Bost Grist Mill Christmas Open House will take place Friday December 3rd, 12th and 13th from 5 ‘til 8 pm. You can shop for your favorite grist mill products, including corn meal, coarse southern grits, dips and mixes, organic pig meat from Bost Farms, and more. Outdoor vendors (depending on weather). Bost Grist Mill, 4701 Hwy. 200, Concord. 704.782.1600.