In a normal summer, potato grower Robert Cerchiaro would heavily push his produce to supermarkets and offer discounts to bolster sales, but record rainfall in 2022 that saturated his land means he is cutting back promotions to keep up with regular orders.

The general manager of Gippsland-based Red Gem Growers, which farms about 3000 acres through NSW and Victoria and supplies supermarkets including Coles and Aldi, expects his yield in the first three months of the year could be 25 per cent lower than usual.