The judges liked the way it "plays with texture, light and form, with a cool, contemplative design".
The garden was a firm favourite with other garden designers at the show yesterday who praised it for its use of space and tranquillity.
Newcomers to the show, Charlotte Rowe and Hugo Bugg, who at 26 is one of this year's youngest designers, both won gold medals, alongside more established designers, Cleve West, Adam Frost and co-designers Tommaso de Buono and Paul Gazerwitz. Giubbilei also won a gold medal alongside the Best in Show award, his third Chelsea Flower Show medal.
The best Artisan Garden went to the Japanese garden, Togenkyo - Paradise on Earth, designed by Kazuyuki Ishihara for a depiction of Togenkyo.
The Mind's Eye by LDC Design and built by Dave Fountain, Pulham Garden Crafts took the Best Fresh Garden award with their sensory garden for blind and partially sighted people in association with charity RNIB.
In the Great Pavilion the Diamond Jubilee Award went to South West in Bloom and The President’s Award went to Birmingham City Council for its World War One commemorative display designed by head of parks Darren Share. Sparsholt College won Best RHS Discovery exhibit and Linda Porrett Best Floral Arrangement.