I had some Carmine Jewel cherry plants on my porch the second week of
this May. They were in individual large pots. It frosted lightly in
the night and all seven plants lost their leaves and died. I had
another six plants inside which did not die. At first I assumed the
leaves would grow back but no they died. I was amazed.
[NAFEX] How hardy is Carmine Jewel?,
Ernest Plutko, 07/24/2011