The installation, designed by Debra Nixon, West Midlands Operations Manager for The Conservation Volunteers will be built by Conservation Volunteers and feature a vegetable patch, fruit hedges, greenhouse, lawn and butterfly and bee border.
The creators hope it will encourage people to get planting and improve public health through the regular work needed to maintain such a garden, in line with the Health for Life partnership programme currently running in the city.
Local volunteers will build the garden in a Birmingham allotment before moving it to the NEC in time for the show between 12 and 16 June.
Conservation Volunteers chief executive Julie Hopes said: "Our involvement with the Health for Life programme is key to helping people realise the benefits of growing fresh produce and getting together to achieve something collectively.
"We hope that our installation at the BBC Gardeners’ World Live event will encourage more people to join."