Pumpkin growers have poured cold water on press reports that pumpkins will be smaller this Halloween because of the dry spring and cool summer weather.

Last week, The Royal Horticulture Society issued a press release warning hobby gardeners not to be "disheartened" if their pumpkins were smaller than usual, as "the dry start to the summer meant plants struggled to get roots into the ground and also led to attacks of powdery mildew disease".

The release led to stories in the national press warning Brits to expect smaller than usual Halloween pumpkins, but commercial growers insisted the weather had had minimal impact on fruit in the mults.

"I don't think it's as big an ­issue as some in the media have made it," said Steve Whitworth, sales manager at pumpkin supplier Oakley Farm.

Oakley supplies Tesco, Morrisons, Sainsbury's and Marks & Spencer.