Believe it or not, California is the #1 agricultural producing state in the USA. California is best known for its production of Citrus, Avocados, Grapes/wine, Tomatoes, and Tree Nuts. CA also produces lots of apples, onions, rice, and olives. CA produces a lot of other foods too, but these are just some of the major crops. CA exports just about every type of food that is grown there.