Freezing the trees, blossoms and all, may be the only way to save the crop.
“Apple flowers can survive up until temperatures of -1.5 °C [29.3 °F]” the agency stated. “By spraying water when temperatures are still between 0.5 and 1 °C [around 32 °F], we create a thin layer of ice that keeps flowers at that temperature.” The same science applies to igloos. These iconic Inuit constructions stay warm inside thanks to the insulating properties of their snow walls, since ice has low thermal conductivity.