Dormancy is a confusing term. It includes both the process of going dormant, which actually begins as the photoperiod decreases (like now). Growth is slower, but necessarily at a standstill. It can also refer to the dead of winter when growth has either stopped or can't be discerned, often viewed as a deep sleep. Dormancy includes many factors, the most significant of which is decreasing light. While lower temps are associated with dormancy, it is far less significant (according to our Southern California hobbyists), as well as less water and critters. While cold is a part of dormancy, it is given more attention than is necessary.