Is 44 Degrees Too Cold for Tomato Plants?

Tomato plants are one of the most popular home garden vegetables. However, their growth and productivity are heavily influenced by environmental factors such as temperature. One common question tomato growers ask is whether 44 degrees Fahrenheit is too cold for tomato plants. In this article, we will explore the effects of cold temperature on tomato plants and provide tips on how to protect them.

The Effects of Cold Temperature on Tomato Plants

Tomato plants are warm-season vegetables that thrive in temperatures between 70 and 80 degrees Fahrenheit. When temperatures drop below 55 degrees Fahrenheit, tomato plants begin to show signs of stress. At 44 degrees Fahrenheit, tomato plants can become damaged and stop growing.

When tomato plants are exposed to cold temperatures, their leaves and stems begin to turn purple. This is due to the accumulation of anthocyanin, a pigment that develops in response to stress. Additionally, cold temperatures can slow down the plant's metabolism and reduce the production of vital enzymes, which can cause the plant to cease growing altogether.

How to Protect Tomato Plants from Cold Temperatures

There are several ways you can protect your tomato plants from cold temperatures:

Cover Them Up: One simple way to protect your tomato plants from cold temperatures is to cover them up using plastic sheeting, blankets, or other lightweight materials. This will help to trap heat and prevent cold air from reaching the plants.

Use Row Covers: Row covers are made of lightweight fabric and are designed to protect plants from cold temperatures. They can be draped over the plants or held in place with stakes. Row covers are also effective at protecting plants from insects and other pests.

Move Them Indoors: If you have potted tomato plants, consider moving them indoors when temperatures drop. Place them near a sunny window or under grow lights to ensure they continue to receive enough light for photosynthesis.

Water Them During the Day: Water your tomato plants during the day when temperatures are warmer. This will help to raise the temperature around the plant and protect it from cold temperatures at night.

Choose Cold-Tolerant Varieties: When selecting tomato plant varieties, consider choosing ones that are more tolerant of cold temperatures. Examples include Siberian, Glacier, and Stupice.

Conclusion

44 degrees Fahrenheit is too cold for tomato plants. Exposure to cold temperatures can cause stress, slow down metabolism, and halt growth. However, there are several ways you can protect your tomato plants from cold temperatures, including covering them up, using row covers, and moving them indoors. By taking these precautions, you can ensure your tomato plants remain healthy even when temperatures drop.