I have two abius, both from PIN....one is called Caribou, the other is Harvest moon....
i just noticed that the harvest moon is super cold sensitive...it has bad leaf damage from a temperature dip of about 42f....and I even made sure to give it plenty of humidity, and a little protection from cold wind....
but the Caribou at the same location, was exposed to wind, without being shielded...and it fared much better, showing zero signs of leaf burn, and even has small flowers still forming all over....
it's interesting to see the variability of cold tolerance within this species.