I'm pretty sure that some French winegrowers do this as well during untimely cold snaps (or used to do it), either that or fly helicopters over vineyards to kee

I'm pretty sure that some French winegrowers do this as well during untimely cold snaps (or used to do it), either that or fly helicopters over vineyards to keep air circulating. Edit to add: Helicopters: An Extremely Effective Weapon in Vineyard Frost Protection [1] Also: Another method commercial vineyards use is to run giant sprinklers through the night, causing water on the vines to freeze over the tender growth. This works because, as the water freezes, it releases latent heat. It can be difficult to understand how ice formation gives off heat. (A chemist would describe ice formation as an exothermic process, one that gives off heat.) - From a long article in WineMaker titled Vineyard Frost Protection [2] So, it's not just the French. [1] https://www.fairlifts.com/helicopter-services/agricultural/helicopters-an-extremely-effective-weapon-in-vineyard-frost-protection/ https://www.fairlifts.com/helicopter-services/agricultural/h... [2] https://winemakermag.com/article/921-frost-protection https://winemakermag.com/article/921-frost-protection