Not always. An onion marketed as a Vidalia onion can only come from Vidalia, Georgia (and a few counties around it [1]). Vidalia onions are different because o

Not always. An onion marketed as a Vidalia onion can only come from Vidalia, Georgia (and a few counties around it [1]). Vidalia onions are different because of the soil used to grow them; they are sweeter and milder than normal onions (and if you take seedling Vidalia onion plants elsewhere, you'll end up with regular onions). Now, does this make Vidalia onions a different food from onions? I don't know. [1] https://en.wikipedia.org/wiki/Vidalia_onion#Legislation https://en.wikipedia.org/wiki/Vidalia_onion#Legislation