Introduction

Tomatoes are a popular garden crop and are easy to grow in a variety of climates. However, like all plants, tomatoes have temperature requirements that must be met in order to grow and produce fruit. One question that many gardeners have is what is the coldest temperature that tomato plants can survive?

Tomato Temperature Tolerance

Tomato plants can tolerate a wide range of temperatures, but their ideal temperature range for growth is between 60-80°F (15-27°C). Tomatoes can still grow and produce fruit in temperatures outside of this range, but they may experience reduced growth and yield.

Minimum Temperature for Tomatoes

The minimum temperature that tomato plants can survive is around 33-35°F (1-2°C). However, this is only if the temperature does not stay at this level for an extended period of time. If the temperature remains below freezing for several hours, the plant cells will freeze and burst, killing the plant.

Cold Protection for Tomato Plants

When temperatures are expected to drop below 40°F (4°C), it is important to protect tomato plants to prevent damage or death. Some methods for protecting tomato plants from cold temperatures include:

Covering plants with a frost blanket or other breathable fabric.

Placing a layer of mulch around the base of the plant to insulate the roots.

Using a DIY or commercial greenhouse to keep the plants warm.

Effects of Cold on Tomato Yields

While tomato plants may survive cold temperatures, it is important to note that prolonged exposure to cold temperatures can have a negative impact on yield. Cold temperatures can slow down or halt the growth of tomato plants and can also cause damage to the fruit. Tomatoes that are exposed to cold temperatures may have an uneven ripening pattern, may not ripen at all, or may have reduced flavor.

Conclusion

Tomato plants are relatively tolerant of cold temperatures, but their ability to survive is not indefinite. Gardeners should aim to keep their tomatoes in temperatures between 60-80°F (15-27°C) to ensure the healthiest plants and the most abundant yields. When cold temperatures are expected, protecting tomato plants with coverings or other methods can help minimize damage.