Big names at Future Gardens will include Andy Sturgeon, Fiona Heron and Jane Hudson, said TJM Associates, the team that launched the International Festival of the Garden, Westonbirt.
A representative said: "In a deliberate move away from high-cost show gardens, Future Gardens offers a bursary giving each designer a maximum budget of £25,000.
"Designers have unrivalled freedom to experiment and create challenging, ground-breaking gardens to fire visitors' imaginations and get the world talking.
"The event will represent one of the most creative environmental initiatives in the UK."
The annual event will take place at Butterfly World near St Albans, Hertfordshire. Teams chosen to create spaces at Future Gardens 2009 include a team of designers from Chile, France and Spain.
UK designers include Paul Draycott of Agave Design, Marcus Green Horticultural Design and Maren Hallenga with Hugo Bugg.
Fiona Heron Design made the list, along with Tony Heywood's Conceptual Gardens and a two-strong team made up of Jane Hudson and Erik de Maeijer.
French designer Bruno Marmiroli will show off his garden alongside Roger Phillips and Peter Thomas Associates Garden Design.
Andy Sturgeon Landscape & Garden Design made the final cut, along with Michelle Wake and Chloe Leaper of Greenwave Design.