They are part of the Beekman 1802 project - which is billed as the 'World's Largest Community Garden" where 10,000 people all across the country grow the exact same thing from the same seeds. You may know the Beekman's from their show, but I think the first time I came across them was when one of them was working for Martha Stewart. She visited their farm back in 2011.
The set includes some items that I never considered growing including radishes and turnips. Here's the full list.