The company revealed that as the confirmed catering partner for the four-day event, it will create bespoke menus and catering concepts for more than 90,000 visitors. The show takes place in Knutsford, Cheshire, between 25 and 28 July.
Amadeus said the contract will help boost its event arm by more than £400,000.
It will provide all the fixed catering at the event and the management of three retail outlets – The Garden Deli, The Retreat and The Garden Lounge. In addition, Amadeus will develop an exclusive RHS Members café, which has been requested by the RHS.
Amadeus is currently the sole catering provider for the RHS’ Hampton Court Palace Flower Show, after securing the contract in 2011.
Kevin Watson, managing director of Amadeus, said: "Winning another three-year contract with RHS for the Flower Show Tatton Park is encouraging of our partnership with the leading charity. Our sophisticated insight into the industry has helped us interpret customer behaviour to give a unique approach to retail ideas and menu concepts."
Stephen Bennett, director of shows at the RHS, said: "We are delighted to be working with Amadeus again for our Flower Show at Tatton Park Flower Show. We felt that Amadeus was the outstanding choice, having had the experience of working with the team previously at our Hampton Court Show."
Last month, Amadeus announced that it had won a five-year contract with worth £2.5m.
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