Pretty picture: Dendrobium Frosty Dawn 'Yen'

I've spent the last five days moving plants in at night and out in the morning -- we had a run of temperatures below 60F/16C. A lot of the plants that are outside will handle that fine (Agave, Strelitzia, Breynia, Amorphophallus), but a few won't so well (Coffea, Aloe, Synadenium, Araucaria), so they have to go back and forth. There are also some (Ananas, Furcraea, Euphorbia, Pachypodium) that