After "volatile" recent sales, the market is now seeing steady growth says AMA, going past £600m in the UK in 2014, up about £100m since 2012.
Furniture is 60 per cent of sales. DIY multiples have 40 per cent market share. Garden centres are losing out to internet sales, the report suggests.
Better bank holiday weather, sporting events, the improving economy and trends towards more use of outdoor space for leisure are driving the market, said AMA.
Barbecues are seeing a trade up from charcoal to gas. Own brands make up half the market.