I'm out of corn what makes the corn?

You can purchase food and materials by visiting the market cart of neighbors or by purchasing through ads in the paper.

Corn makes corn. Plant one and after some time you harvest two. The gane warns you when you try to sell your last item of a certain crop. If you than sell the crop you first need to aquire a new one by either finding on through the ads or looking in the marketsof your neighbours/followers/people you follow.

You would have to buy more from the shopper and them plant them to get it times two