The article would look a bit dull if it consisted of nothing but links to various countries web sites, so what about an introductory piece about why foods are seasonal - about what triggers the changes that make food available? Another bit of interest might be a section about how international trade and particularly air freight, riding at low cost in the holds of passager aircraft, have made produce available out of season to the wealthier nations? And how methods of packaging and preservation have made out of season marketing possible? Mention might be made of the economic effects of this trade on the producer countries. Another aspect of the food in season topic is the creation of artificial conditions to overcome natural seasonality - cultivation of fruit and vegetables in plastic tunnels etc.  

 Another sourse of informatoin might be guides used for training supermarket produce buyers, if anyone can get hold of something along those lines?  And thinking about that, mention might be made of the primum price that the added value of produce out of (natural) season can command. What do you think?