Traditional Culture Encyclopedia - Weather forecast - What is the lowest temperature of the insulation bag for express green plants?

What is the lowest temperature of the insulation bag for express green plants?

Now it's MINUS 7℃, and the plant packaging is very good. Generally, it is wrapped in cotton first, and then wrapped in toilet paper. If the weather is warmer, it will be delivered directly in toilet paper packaging. And there will be a thermal insulation layer outside the carton. Such packaging is generally acceptable at around MINUS 7 degrees.