We are very protective of the term “Vidalia” when it comes to onions. There are many imposters grown in various places, but there is only one true honest-to-God Vidalia.The official debut day is Monday, April 22. The official counties are Appling, Bacon, Bulloch, Candler, Emanuel, Evans, Jeff Davis, Montgomery, Tattnall, Telfair, Toombs, Treutlen and Wheeler, as well as portions of Dodge, Jenkins, Laurens, Long, Pierce, Screven and Wayne.