Hawke's Bay's half billion dollar fruit industry could be in jeopardy if Saturday brings predicted frost across the region.
Southerlies set to develop later could bring the potential for frost to the Bay.
Hawke's Bay Fruitgrowers Association president Lesley Wilson said a frost this late could damage the fruitlets growing throughout the region.
"It's the one time a year to get income so growers are prepared," she said.
Ms Wilson said growers would be keeping an eye on the weather and if the frost did hit they would have irrigation and helicopters at their disposal to counter it.