http://www.srgc.org.uk/bulblog/log2006/281206/log.htmlAlthough I am a new comer on this wonderful site, I have read all of the bulb log and Thursday is the day to happily discover the new bulb log. I am very impressed by Ian's knowledge, but for once I do not agree with one idea:
"The frost on the cyclamen leaves comes from water drawn from the leaves and frost does not show up on stones since no water can be drawn".
I think it is more a matter of thermal conductivity: leaves are thin and get frozen, and then water can crystallize. Crystallisation does not occur on stones since the stone is warmer due to the calories drawn from the soil.
If it was water drawn, the glass on the top of the glass house would not show any ice outside and dry leaves would not crystallisation as well.
Dry cold weather is surely the best way of drying to death cyclamen leaves and they should not be left unprotected if possible, but they will not be damaged if the cold has enough water to condensate on the leaves which still seems to the case here.
I wish everyone a happy new year from Paris area and I know that on Thursdays in 2007 I will have the bulb log to make it a happy day.
Pierre