What Temperature Kills Tomato Plants?

Tomatoes are one of the most loved and cultivated vegetables worldwide. They have a specific temperature range where they thrive, reproduce and grow optimally. However, extreme temperatures, whether too cold or too hot, can be damaging to the tomato plant.

Minimum Temperature for Tomato Plants

Tomatoes are warm-season plants and do not tolerate cold temperatures well. The minimum temperature tolerable by the tomato plants is 50°F (10°C). When temperatures drop below this threshold, the tomato plant growth rate slows down, and the leaves begin to wilt. Prolonged exposure to chilly temperatures will cause the plant to stop growing altogether and eventually die.

Temperature Range Suitable for Tomato Plants

The range of temperature that is ideal for tomato plants is between 65°F and 85°F (18°C-29°C). In this temperature range, the plant grows best, is most productive and has the highest quality of fruits produced. The optimal temperature range for seed germination and root development is between 70°F and 80°F (21°C-26°C).

Maximum Temperature for Tomato Plants

Jumping to the other extreme, too much heat is also detrimental to tomato plants. The optimal high temperature for tomato plants is 85°F-90°F (29°C-32°C) anything above that will damage the leaves, flowers, and fruits. Temperatures above 100°F (38°C) can cause irreversible damage and lead to a wilted plant that ultimately dies.

Ways to Protect Tomato Plants from Temperature Extremes

There are several ways to protect tomato plants from temperature extremes:

Plant tomato plants in raised beds or at the bottom of a slope that prevents frost accumulation.

Cover plants with plastic sheets to trap heat during chilly weather.

Install shade cloth during hot weather to reduce the amount of the sun hitting the plant.

Water thoroughly during hot days to keep the soil moist, and the plant hydrated.

Use mulch to keep the soil moist and, in turn, prevent overheating.

Conclusion

In conclusion, extreme temperatures can be harmful to tomato plants, and it is essential to maintain an optimal range at which the plant will thrive. If you live in a region where extreme weather conditions are expected, it is advisable to take measures to protect your tomato plants to maintain their productivity and longevity.