Hi Aimee, as weather warms up, it eventually goes back to green. The leaves will not die because of that, it is just a stress reaction to the chill. That is as long as it remains dry. If it rains and gets chilled like that, leaves gets damaged, it will have those nasty black spots, so the plant will just eventually drop that damaged leaf, but it is so quick to bounce back when conditions gradually warm up. As weather warms up, new growth begins again from the center of each rosette or in between the nodes of the branches or the stem itself.
Winters are so different year to year..but the more mature the plant is the more it is able to handle the varying weather conditions.
