The Hampton Court Garden Festival (formerly The Hampton Court Flower Show) is the largest flower show in the world. The show is held in early July. The show is run by the Royal Horticultural Society (RHS) at Hampton Court Palace in the London Borough of Richmond upon Thames.
The show features show gardens, floral marquees and pavilions, talks and demonstrations.
Erected on the north and south sides of the Long Water in Hampton Court Park, it is the second major national show after the Chelsea Flower Show but has a different character, focusing more on environmental issues, growing your own food and vegetables and cookery, as well as selling gardening accessories, plants and flowers.
The original Hampton Court Palace Flower Show was the brainchild of the management consultant Adrian Boyd, who saw an opportunity to connect two organisations facing times of uncertainty in a joint venture.
According to en.wikipedia