"It's the memories feijoas evoke of childhood - the taste and the smell," Julie added.
The Bay Of Plenty New Zealand Tree Croppers previously claimed the biggest feijoa, at 233 grams.
Roger and Julie's feijoas dwarf this in comparison, with a fruit weighing in last night at 316 grams - a new record for a fruit from their trees.
Mr Corbett insisted his feijoas were better eating than the smaller and more plentiful fruit.
"They're absolutely magnificent. They've got a lot more flesh. Once you scoop out the large part where the seeds are, you're left with a lot of creamy flesh, and it's a beautiful flavour."
The couple has tended the trees for the past two years, fertilising them with sheep manure.
"People tend to ignore their feijoa trees, but if you prune them properly, and fertilise them, they'll produce better fruit," Mr Corbett said.
The season for the South American fruit generally runs from March to late June.