Will Tomato Plants Die at 48 Degrees?

Tomatoes are a warm-weather crop that are generally grown in temperatures ranging from 55 to 85 degrees Fahrenheit. While they can tolerate some fluctuations in temperature, extremes can have negative effects on their growth and productivity. So, will tomato plants die at 48 degrees?

Effects of Low Temperature on Tomato Plants

Low temperatures can slow down or even halt tomato growth and development. In temperatures below 50 degrees Fahrenheit, tomato plants may stop growing entirely. The exact effects will depend on a variety of factors, including the duration of the low temperature and the humidity level.

Additionally, low temperatures can impact a tomato plant's ability to produce fruit. Often, flowers will drop off the plant before they can be pollinated or fertilized, leading to a decreased yield.

Chilling Injury in Tomato Plants

Exposure to low temperatures can also cause chilling injury in tomato plants. This occurs when the plant tissues are damaged by exposure to temperatures below their usual range. Symptoms of chilling injury can include discoloration of leaves, watery or blackened areas on the fruit, or stunted growth.

In some cases, chilling injury can be severe enough to kill the entire plant. However, this is more common in temperatures well below 48 degrees Fahrenheit.

Protecting Tomato Plants from Low Temperatures

While tomato plants can tolerate some fluctuations in temperature, it's best to avoid exposing them to extremes if possible. Here are some tips for protecting your tomato plants from low temperatures:

Plant tomatoes after the last frost date in your area to avoid late-season cold snaps.

Use row covers or plastic sheeting to protect tomato plants from frost.

Consider growing tomatoes in a greenhouse or high tunnel to regulate temperature and humidity levels.

Choose tomato varieties that are more tolerant of low temperatures or shorter growing seasons.

In Conclusion

Tomato plants may not necessarily die at 48 degrees, but they can be negatively impacted by exposure to low temperatures. If you live in an area with extreme temperature fluctuations, it's important to take measures to protect your tomato plants and ensure their growth and productivity.

By following these tips and monitoring the weather forecast, you can help your tomato plants thrive even in less-than-ideal conditions.