Ken Nottage, chief executive of Three Counties, said: "Yesterday was a fantastic day marking the very beginning of RHS Malvern Spring Festival. It is the day when designs begin to transform plans to real gardens and the whole showground is buzzing with excitement.
"There is a real community amongst our show gardeners and the support they offer one another throughout the process is invaluable, something we are deeply proud to have here at RHS Malvern. This year's show gardens will be a real spectacle with some incredible, diverse and creative talent showcasing their skills. We cannot wait to see this area of the show come to life over the coming weeks."
This year's gardens occupy the largest space ever at the showground. The breaking of ground at RHS Malvern coincides with National Gardening Week, an RHS initiative launched in 2011. Thousands of people, gardens, charities, culture and heritage organisations now support the annual event.
The details of the show gardens were announced in February. Alongside will be three Festival Gardens, offering a space for emerging garden designers to show their skills.
This year's designs follow the theme of "hidden gems" and are supported by Readyhedge, Wyevale Nurseries and Keyscape Landscape Design and Construction. They are:
Hidden Gems of Worcestershire by Styling Homes and Gardens This garden "intertwines technology with agriculture and history with space age" and celebrates the diversity and horticultural beauty of Worcestershire.
The Low Line by Pro-gardens A design heavily inspired by the recent rejuvenation of the High Line in Manhattan, New York by Piet Oudolf.
The Water Spout by Christian Dowle of Garden Inspiration Inspirations for Dowle's design comes from the numerous waterspouts and natural springs that emerge from granite rock all over the Malvern Hills.