While trade with Cuba holds untapped potential, the United States government closely regulates exports and travel. Several federal government web sites provide background information on Cuba and the U.S. requirements for trading with Cuba.

The United States Department of Agriculture has a web site with detailed information on agricultural trade with Cuba: 
Department of Agriculture

The United States government has a list of currently allowed agricultural products for export to Cuba. See PDF document of list.

The United States Department of Commerce has a web page for electronically applying for a license to export agricultural products to Cuba.  Assistance with the application process can be obtained by calling the Commerce Help Desk at 202-482-4811.
United States Department of Commerce

The United States Department of State has a web site with an overview of U.S. policy with Cuba and links to useful information:  
United States Department of State

The Office of Foreign Asset Control (OFAC) within the United States Department of the Treasury administers and enforces economic and trade sanctions against other countries. OFAC’s web site contains a host of documents on Cuba, including instructions for applying for a travel license to Cuba and a list of licensed US travel agents who can book your travel to Cuba.  United States Department of the Treasury

The Texas Department of Agriculture has a wealth of information and skilled staff to assist Texans export agricultural products.   Its web sites provides contact information, along with other helpful export facts.