What Temperature Can Tomato Plants Tolerate

Although tomato plants can survive temperatures down to 33 degrees Fahrenheit, they show problems when temperatures drop below 50 degrees F, according to the U.S. Department of Agriculture Research Service.

What temperature is too low for tomato plants?

Temperatures below 55 degrees Fahrenheit are too low to grow a healthy tomato plant, says The University of Arizona Cooperative Extension. The low temperatures interfere with normal pollination of the blossoms, which drop off the plants. Fruit fails to set, so no tomatoes are produced.

What temperature is too cold for tomatoes on the vine?

Tomato plants and fruit freeze when the air temperature is below 32 degrees, according to the Ontario Ministry of Agriculture, Food and Rural Affairs. Between 32 and 55 degrees, tomatoes suffer from chilling injury. Growth may be stunted, leaves wilted or pitted and plants may be more susceptible to disease.