Quote:
Originally Posted by Dalachin
Nice cymbidium!
Roberta, that article is wild! A bold move to allow the entire greenhouse to ice up, and it paid off, who would have thought. Thanks for sharing!
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Not a greenhouse, a shade area. Cyms in southern California grow outside. But this grower's area gets a few frosty nights even in normal years, so infrastructure was there. (there is an alarm that rousts him out of bed to turn on the misters when the temperature hits 29 deg F.. but in that year it went down to 17. Cyms are tough but not THAT tough) Citrus growers do this on a much larger scale. (They also use wind machines to keep frost from settling when there's just a few degrees involved) The water technique works because as long as there is liquid water (low flow misters provide that), as it freezes it releases heat - and the temperature stays at 32 deg F/0 deg C. If the flow of liquid water stops, the ice layer goes down to ambient and everything freezes. So it's the continuous water supply that is critical.
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