Those who are planning on growing spinach will want to know about how it will react to frost, especially in certain climates. The fact is that spinach can withstand mild frost but when it becomes too severe it can easily die. How well spinach does in frost depends on the time of the year and area. While spinach may be able to stay alive in mild cold/frost, it cannot last through some of the colder months. This is valuable information to have if you are planning on growing it yourself. It is certainly important to be prepared for frost if you are growing spinach, as it can die under severe enough conditions.