Frost damage is always a challenge with tree fruit and vines.
One cold snap can ruin a future season in a matter of minutes. But, Matthew Whiting, Professor of Horticulture at Washington State University's Irrigated Agriculture Research and Extension Center in Prosser, WA, notes the options for frost control have been the same for many years.
"Out West , growers have utilized the same systems for decades," he says. "They've been combining wind machines with under-tree microsprinklers and sometimes heaters."
Source: Growing Produce