North American Fruit Explorers mailing list at ibiblio

[Kieran <holycow@frontiernet.net>]

Scott,  Frost implies stratification of air, and the individual leaves 
can be much colder than the official temp.  With a "freeze" under cloudy 
skies with still air, there is less dessication.  Also with a frost 
there may be bright sunshine in the morning that damages frozen leaves.  
It's a weird subject.  In Fla the orange growers used to leave cabbage 
palms in the groves, where their lollipop shape apparently stirred the 
air in convection freezes and brought warmer air down closer to the 
ground around the trees.   Donna

On 1/23/2013 9:00 AM, Scott Breneman wrote:
> Hi all,
>
> Been growing vegetables and subtropical container plants for a long time and 
> have seen plenty of frost-blackened vegetables outdoors.  What I don't 
> understand very well is why 28 degrees in my sunporch didn't harm my tomato 
> plants the other night and 24 last night didn't seem to affect my 
> subtropicals--guava, jaboticaba etc.  The frost formation is more deadly than 
> the sub-freezing temperatures?
>
> Scott
>
> near Lancaster, PA
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