The Copella Bee Garden was created from a bee's point of view to highlight the issue of bee decline in the UK and show what you can do in the garden to help, she said.
The layout will take inspiration from the rhythm of the bee's "waggle dance" movement, while the overall concept will reflect the bee's journey from plant to hive.
A sculpture will form the focal point, overlooked by three mature apple trees. Wild flowers and blue and mauve coloured plants will aim to attract bees. These include Geranium pratense 'Mrs Kendall Clark', Hyssopus officinalis (blue), Lavandula x intermedia 'Grosso' and Melianthus major.
Stowell, who worked with Copella Fruit Juices, will unveil the garden at the Hampton Court show, which is running on 6-11 July. She trained in fine art before moving on to explore the three-dimensional aesthetics of landscape design.
Other highlights at the show will be Tourism Thailand, designed by James Clarke, based on a section of a river in rural Thailand.
An Uprising in Kindness by garden designer Bill Butterworth, meanwhile, will symbolise the beginning of homelessness charity Emmaus in 1954.