how cold can christmas cactus tolerate

Christmas Cactus is a hardy plant that can tolerate cold temperatures. It can withstand temperatures as low as 45 degrees Fahrenheit (7 degrees Celsius). However, it's best to keep the plant in a cool, well-ventilated area to prevent it from being exposed to excessive cold. If the temperatures are going to drop below 45 degrees Fahrenheit, it's best to bring the plant indoors or provide it with some type of protection.