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RE: Regarding "frost warning" help

Square Foot Gardening List - http://www.flinet.com/~gallus/sqft.html

> Regarding a suggestion that was given to Lisa:
> Getting up early (b4 the sun rises in my area) to water spray my garden in

> order to prevent possible frost warning damage is something I will 
> definitely try NOW & in the fall. It sounds like the easiest possible way 
>for me (& clever!), but I'm inquisitive----how does this process prevent
the 
>damage?

As far as I can tell, this spraying-water business is based on the mistaken
idea that ice cannot get colder than 32 degrees F.  Ice, of course, can get
as cold as its surroundings, all the way down to absolute zero in places
like Ottawa <grin>.

If somebody has a good reason why frozen fog is more damaging than frozen
tap water at the same temperature, I'd love to hear it.  Of course, if the
water is warm and it warms up the plants so that they don't freeze at all,
that would be different.  But, I have known people to encase their poor
plants in solid ice cubes trying to prevent freeze damage.  As far as I
know, it doesn't work.

-BT


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