Steve, my experience with this especies is that although it normally grows in very warm regions of Venezuela, in culture it likes cooler temps. However, I think 55-60 is a bit too cold.
Keep in mind I am talking of temps around 68-75 in the wild at night, and preferrig temps 62-65 in culture... at least, my experience and that of many friends in Venezuela. In the region where I used to grow my plants (and also where my friends grow them) you rarely have temps lower than this at night. On the other hand, the most important nurseries around Caracas are located around "El Hatillo", they grow very good C. lueddemannianas and they can have night temps around 60 between December and January.
Hybrid Mode
