Lettuce and cucumber prices jumped sharply in May as colder weather hit production.
Butter and sausages also rose sharply, but overall food prices rose just 0.3 per cent in May. Compared with a year ago, overall food prices were down 0.1 per cent, Statistics New Zealand figures show.
In May, lettuces rose 38 per cent and cucumbers 110 per cent. Vegetables rose 6 per cent for May, but fruit was down 2.6 per cent with cheaper kiwifruit and mandarins. May grocery prices were generally flat, but butter was up 27 per cent.