Primula acaulis F1 Zebra Blue took the bedding and balcony category prize. The compact variety from Belgian breeder Rudy Raes Flower Seeds has already been named a Fleuroselect Approved Novelty.
Best flowering house plant was the most contested category, with 24 entrants. The winner was Kalanchoe Queen Wildflowers 'Charming Purple Bouquet', from the Danish breeder Knud Jepson.
Winner in the perennial category was Campanula portenschlagiana Get Mee 'Dark' from Gartneriet, which markets itself as Fairytale Flowers. It has developed the Get Mee range over 25 years.
Mandevilla x Diamantina 'Citrine', the result of a partnership between French specialist grower SA Lannes and Spanish propagator New Plants Motril, Spain, won the pot plant category.
Magnolia x soulangeana 'Genie' took New Zealand nurseryman Vance Hooper 15 years to breed. Marketed in Europe by Plantipp, its crimson hues broke new ground in the woody plants category.
Tweedia caerulea 'Pure Blue', with its forget-me-not-like petals and soft foliage, won the cut flower category. It was bred by JA Tosa Aki and exhibited by the Japanese Flower Export Association.
The vividly coloured, multi-stemmed Cymbidium Koshu Moon 'Yokihi' on show from Mukoyama Orchids, took the Jury's Special Prize. The firm has been breeding orchids for 45 years.