An Australian fruit farm has produced the world’s heaviest blueberry – its sweet honour being confirmed by Guinness World Records.

The blueberry, weighing a whopping 20.4 grams and measuring 39.31 millimetres, was grown at a farm in Corindi, on the NSW north coast as part of fruit and vegetable producer Costa Group’s international blueberry improvement program.

“It’s official!” Costa Group wrote on Facebook on Thursday as it announced the world-beating berry had been confirmed by Guinness World Records.

The blueberry, which is of the Eterna variety, was picked on November 13, 2023, and grown by Brad Hocking, Jessica Scalzo and Marie-France Courtois. It easily beat the previous world record, for a 16.2-gram berry grown in Western Australia in 2020.

Costa’s “variety improvement program” is based at Corindi and has run for 25 years. Senior horticulturalist Brad Hocking said the Eterna variety was known for its large fruit size, crisp texture and long shelf life.

“Eterna as a variety has a really great flavour and consistently large fruit. When we picked this one, there were probably around 20 other berries of a similar size,” he said.

Despite the record, quality and flavour remain the program’s top priority.

“This really is a delightful piece of fruit. While the fruit is large, there’s absolutely no compromise on quality or flavour as would be expected when developing a premium variety blueberry,” Hocking said.

Costa’s Corindi program develops one or two new commercially viable blueberry varieties every year.