I doubt that the interior of a house got below freezing. In reading the
original post, my impression is that they simply didn't turn the heat on
some of those frosty nights -and I suppose the interior of the house
probably got down to 45 or even 40. I don't remember the exact numbers, but
I think it takes a well -insulated house several days to get below freezing
even if the outside temperature never rises above freezing.
"Cereus-validus-..........." wrote in message
t...
.....and when the temperature goes below freezing, they are irrevocably
dead.


"Anthony B" wrote in message
...

"Robert" wrote in message
. 11...
My three varieties of calathea all died after living happily in a bright
room near north-facing windows for more than a year; I suspect I let the
house get too cold during a few frosty nights we were unprepared for.

How low does their temperature tolerance go?

Thanks,

Rob
Maryland

Rob,
Calthea, like most torpical/houseplants, begin to become unhappy(shedding
foliage, turning yellow,esct.) at temps below 55 degrees and will begin
to die at temps approaching 40 degrees and below

Anthony B
Ky Certified Nurseryman