The circular layout will be sectioned into four quarters, representing the continents of Europe and the Middle East; Asia; North and Central America; and South America with a centrepiece octagonal glasshouse from Hartley Botanic.
RHS Hyde Hall head of site Ian Le Gros said: "The RHS is extremely lucky that Xa Tollemache, one of the world's leading garden designers and landscapers, has been a garden adviser for RHS Garden Hyde Hall for the past six years.
"She has been developing the garden on an expense-only basis. Xa has been proactively involved in helping us form the overall concept for the Global Growth Vegetable Garden concept, drawing on her own experience at Helmingham Hall where she successfully developed the walled kitchen garden."
Meanwhile, the RHS intends to submit plans to Guildford Borough Council in mid April for the redevelopment of its Wisley garden entrance. Christopher Bradley-Hole is landscaping the new entrance around a proposed science building, while architect Carmody Groarke is planning a new entrance building. Wisley had a public exhibition of the £50m plans last week.