If you are growing any of the Brassavola species, this would be the same. I don't think it will take a frost or freeze though. That's just my guess. If your growing area is outside there are some steps you can take. A plastic sheet can make a difference of 2-4 C. I don't know if you could use a small kerosene heater in the area but that would make a big difference if you only need to use it on rare occasions.






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