An Australian-grown pumpkin has set a new record for the heaviest in the southern hemisphere at the 2021 Giant Pumpkin and Watermelon Festival in Kyogle in northern New South Wales.

The Atlantic giant pumpkin grown by Dale Oliver weighed in at 867 kilograms.

Festival organiser John Leadbetter said it was a great achievement for Mr Oliver and the festival.

“I reckon it’s blooming good. I’m proud of him and I’m glad it’s happened here at our competition,” he said.

While it did produce a record-breaking pumpkin this year, entries to the festival were down due to unfavourable growing conditions.

“It’s just been too hot for it. We had hot, dry weather, and then we went to hot, humid weather, and they don’t like that. They like to be dry and cool,” Mr Leadbetter said.

What does it take to grow a giant pumpkin?

Mr Oliver, who set an Australasian record with a 743-kilogram pumpkin in 2015, said growing giant gourds involved a lot of work.

“People are changing the way they’re growing them nowadays,” he said.

“There’s a lot of work in them with pruning and fertilising and getting soil tests. There’s a lot of science in it.”

Dale Oliver’s giant pumpkin weighs in at 867kg, setting a new record for the Southern Hemisphere. Photo: ABC North Coast/Catherine Marciniak

While growers are able to control some elements, weather conditions are uncontrollable.

“The weather’s your biggest battle here,” he said.

“When we get them hot spells they stop growing, and it’ll send them into maturity.

“We got that hot spell in November and it really slowed this, but it picked up again.

“It’s a shame we got the heat. It may have done better.”

The Giant Pumpkin Festival also featured a competition for the tastiest pumpkin scones. Photo: ABC North Coast:/Catherine Marciniak

Mr Oliver grew the record-breaking pumpkin at his nursery at Knockrow, north of Ballina, on the far north coast of NSW.

He said while some people do eat the flesh from giant varieties, they are usually fed to cattle.

“I’ll take it home because I’ve got a few rellies who want to get photos with their babies, and we’ll get the seed out of it because a few guys want the seed,” he said.

The previous Southern Hemisphere record of 860kg was held by South African Piet Lotz, set in March last year.

The world’s heaviest pumpkin, measuring 1190.49kg, was grown by Mathias Willemijns in Belgium in 2016.

–ABC