Thousands of visitors are expected at Trinity Park near Ipswich for the 176th Suffolk Show.
The show provides a chance to see a range of animals
The Suffolk Agricultural Association showpiece takes place, as usual, at the Suffolk Showground on Felixstowe Road.
Green issues are among the main themes of the two-day event where Suffolk's bid to become England's greenest county is being launched.
Prince Edward is expected to attend the show, which attracted nearly 90,000 visitors last year.