We had a greenhouse heater failure and the overnight temperature fell to 25F. Soil in the pots was mostly frozen. Despite that, most of the rooted plants have come back.
This is the Zaytuna variety sprouting from its pot:
Puerto Rico variety:
This is one of the three year old plants that was in full leaf before the freeze:
Cold temperatures have been suggested as a flowering trigger, so maybe I will get lucky and this will convince some of the plants to go to seed.