David in Normandy writes
Jonathan Campbell wrote:

(Incidentally.) I'm told that in this neck of the woods, a farmer
practice is, if the potato crop has emerged and there has been frost
during the night, they spray them with water before the sun comes up
--- using the sprayer normally used for anti-blight spray and for
killing seed potatoes.
The rationale for the damage prevention was explained to me but I've
forgotten.
I'll ask and report back; maybe useful for gardeners?

I'd like to know about this. It seems counter intuitive to spray them
with water.

Gentle warming? Instead of sudden warming when the sun gets on to them
--
Kay