The cold has resulted in little or no damage to fruit but overhead sprinklers have been running for three successive nights at some rural properties.
Apricots are the most developed fruit throughout the district, followed by nectarines, cherries, grapes, and apples.
In general, fruitgrowers have labelled the new season as fairly average - with the occasional frost a typical part of spring.
Earnscleugh orchardist and grape grower Russell Clayton said bud-burst started on vines in the past week but only some growers chose to frost-fight.
He had run overhead sprinklers for three consecutive nights on all his fruit, which stretched his water supply.
"There's no substantial damage but it's been an expensive exercise as we've had sprinklers and back-up pumps running.
"It was a lot worse last year when we had bad frosts right on pollination," he said.
In the past week, the lowest recorded temperature on Mr Clayton's property was -3.8degC.
Roxburgh orchardist and Summerfruit New Zealand chairman Gary Bennetts said frosts had been less severe in the Teviot Valley.
Mr Bennetts said fruit growers in the area had also used overhead sprinklers to protect crops, which had avoided damage.
He said it was hard to determine the crop size as fruit was just starting to form, but he thought it had been a good spring to date.
"It looks as though we've got a very balanced crop this year," he said.
September had been drier than usual, but frost-fighting with overhead sprinklers meant trees received irrigation through the process, he said.
Jones Family Orchard manager Michael Jones said Cromwell's fruit crop had also avoided damage due to overhead sprinklers being used to protect against the cold.
Orchardists and grape growers in the Cromwell basin were generally in the same situation as those throughout the rest of Central Otago, he said.
