Gardenia is not cold resistant plants, generally below zero temperature is difficult to adapt, resulting in frostbite. Gardenia jasminoides Ellis is more resistant to cold than normal, it can stand the low temperature of minus 2 degrees, but it's better to keep the temperature above zero and take cold prevention measures in time. The north moves indoors before the frost falls. The South can be covered with bags. It also needs to add sunshine and improve its temperature.