Alexandra Lehne and Momo Pino won a £6,000 commission to build their garden after it was hailed as "one of the best entries ever submitted to the competition".
Southport Flower Show held the event and the students will use the event held in Merseyside during August to show off their design.
A timber pergola-like post-and-beam structure forms the design's centrepiece, surrounded by boulders, shrubs and grasses and offset by vertical screens.
The students, from the Oxford College of Garden Design, were briefed to create a garden based on the show's theme of "coast" on a 6x6m plot.
Their submission included a detailed scale plan, planting scheme, scale drawings and an illustration.
The college is running the world's first interactive online garden design course alongside its full time course.