Honey does not expand in cold in my observations. The oppisite, it shrinks.
In Finland we don't have experiences of extreme cold, but -35 C is met almost
every year. No problem for jars in these temperetures.
As
others wrote before sugars act as antifreeze. I remember reading that honey
freezes at extremly low temperatures like -190 C.
A jar of liquid honey in -22C will run out when put upside down, but not very
fast :)
Ari Seppälä
Finland
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