How Cold Can Tomato Plants Survive?

Tomatoes are warm-season plants that thrive in temperatures between 70°F and 80°F. However, they can tolerate cooler temperatures when planted in the spring or fall. But how cold can tomato plants survive?

Tomato Plants' Cold Tolerance

Tomato plants can tolerate temperatures as low as 45°F, but they prefer temperatures above 50°F. When the temperature drops below 50°F, the growth of the plant slows down, and the flowers drop off. If the plant is exposed to temperatures below 40°F, the leaves will start to turn yellow and eventually die. If the temperature drops even further, to 32°F, the tomatoes themselves may freeze and become damaged.

Protecting Tomato Plants From Frost

To protect your tomato plants from frost, cover them with blankets or tarps to trap the heat from the soil. You can also use plastic sheeting, but make sure to remove it during the day to prevent overheating. Another option is to use water jugs, which capture heat during the day and release it at night. Surrounding your tomato plants with mulch can also help insulate them from the cold.

Other Factors That Affect Tomato Plants' Cold Tolerance

The cold tolerance of tomato plants depends on other factors besides temperature, such as the age and size of the plants, as well as their health and hardiness. Younger plants, for example, are more susceptible to frost than mature plants, which have thicker stems and stronger root systems. Additionally, plants that are stressed or damaged are more vulnerable to cold weather.

Conclusion

Tomato plants can tolerate temperatures down to 45°F, but they prefer temperatures above 50°F. To protect your tomato plants from frost, cover them with blankets or tarps, use plastic sheeting, surround them with mulch, or use water jugs. The cold tolerance of tomato plants also depends on other factors such as plant age, size, health, and hardiness.