In my neck of the woods, potatoes, tomatoes and courgettes have already been completely zapped by frost. Last night even the grapes and figs took damage.
And yes, fruit growers do use water against frost but it needs to be a very fine continuous mist, not a heavy spray. As the water freezes, it releases a small amount of heat, which helps keep buds and blossoms around 0°C and reduces severe frost burn. Timing and coverage are everything.
Watering your tender plants before the frost actuallly makes the problem worse as too much water or the wrong spray can make things worse, so timing and coverage are everything. See article below and in particular last para:
https://www.npiwaterstorage.com/misting-as-frost-protection/
Originally Posted by: Sasa