The team of specialist floristry and art and design landscape students from the Welsh College of Horticulture at Flintshire was one of only six entries to be chosen by the RHS from more than 40 applicants.
The garden was inspired by legendary Welsh prince Owain Glyndwr and the landscapes of Wales, and was awarded a silver gilt by judges.
It is educationally themed and designed to be viewed from numerous angles, including from above.
Students started work on the garden in December last year as part of their two-year foundation degree course.
Floristry and art programme leader Paul Raven also created a floral display for the show.
It consisted of 200 pieces of bamboo imported from Asia against a backdrop of painted parallel stripes to represent the Glyndwr University logo.
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