Sun Gold tomatoes can be on restaurant plates in San Francisco in less than 24 hours. Beth Hoffman for NPR hide caption

itoggle caption Beth Hoffman for NPR

First lady Michelle Obama talks to people in the crowd as she picks some fresh produce from a stall at the opening of a new farmers market near the White House on Thursday. Manuel Balce Ceneta/AP hide caption

itoggle caption Manuel Balce Ceneta/AP

Baker Bertrand Houlier with the sweet treats and breads he sells at the Montgomery Farm Women's Cooperative Market in Bethesda, Md. Marisa Penaloza/NPR hide caption

itoggle caption Marisa Penaloza/NPR