<p>A poor hazelnut harvest in Turkey is pushing up the prices of Nutella, with some shoppers already paying up to 25% more, the Mirror reports.The prices for the nut (the raw material of Nutella) are said to be up by 38%.It could get even worse, as growers hold on to their supplies, analysts Mintel warned.Shoppers are now paying £2.50 a jar in Tesco, Asda, Sainsbury’s and Waitrose – compared to £2 last year.Prices for cashews and peanuts are also shooting up due to unseasonable weather, the report suggested.<br></p>