Market information manager Dave Denny said better weather and improved retail surroundings helped performance. Outdoor living was the star, up 14 per cent.
"Outdoor living was helped by better summer weather. Garden centres upped their game with in-store environment." Christmas was six per cent up last year on 2012 because of better weather, he added.
The survey covers 70 retailers overall.
Garden Centre Association figures showed its members were up 3.3 per cent in 2013.