Gregg's passion for fresh produce came from one of his first jobs as a warehouseman at Covent Garden fruit and veg market.
After running a successful greengrocers stall, Gregg soon swapped selling veg to talking about it on a number of Radio 4 shows.
I've always been impressed by great chefs. I now consider farmers to be even more heroic.Greg Wallace
As a champion of quality fruit and vegetables, Harvest 2013 will be a chance for Gregg to explore how our crops are nurtured in the field before they arrive on our dinnerplates.