The very first Hampton Court Flower Show was in July 1990, the concept of management consultant Adrian Boyd. The idea was to connect Historic Royal Palaces and Network Southeast rail services in a joint venture because the organisations were both looking for ways of increasing revenue.
The show was a success, even though there was little trade support, it drew in large crowds. Adrian Greenoak, the Show’s horticultural director, introduced a British Rose Festival in 1991, with the joint involvement of the Royal National Rose Society and the British Rose Growers’ Association. In November 1992 Network Southeast announced it was withdrawing its sponsorship for the show. After negotiations and competitive tendering, Historic Royal Palaces accepted a bid from the RHS.
The first official RHS Hampton Court Flower Show took place in 1993, with additional sponsorship from the Daily Mail. With a 25 acre show ground, there was room for expansion. Over the next few years a Heritage Marquee was set up for the NCCPG and its national collections, also several display gardens and water gardens were introduced.