What Temperature is Too Hot for Tomato Plants

Tomato plants are a popular choice for gardeners in many regions around the world. They are easy to grow, provide a delicious fruit to eat, and add aesthetic value to gardens. However, like any plant, there are specific environmental conditions that tomato plants thrive in, and others that are detrimental to their growth. One such condition is temperature, and in this article, we will discuss what temperature is too hot for tomato plants.

Optimal Temperature for Tomatoes

Before we discuss the temperature that is too hot for tomato plants, it is essential to know what temperatures they thrive in. Generally, the optimal temperature range for tomato plants is between 70°F to 85°F (21°C to 29°C). At this temperature range, tomato plants can photosynthesize effectively, take up nutrients and grow in a healthy manner.

Signs of Heat Stress in Tomatoes

Tomato plants become stressed when temperatures exceed the optimal range. Heat stress occurs when the ambient temperature is too high, making it difficult for the plant to keep its internal temperature at a level where metabolic processes can occur. When the temperature gets too high, tomato plants tend to display several signs of heat stress. These signs include:

Wilting leaves

Stunted growth

Yellowing leaves

Reduced fruit production

Fruit cracking

Blossom drop

If you notice any of these symptoms, it means that your tomato plants are experiencing heat stress, and you need to take corrective measures immediately to prevent further damage.

Temperature That is Too Hot for Tomato Plants

The temperature that is too hot for tomato plants largely depends on their stage of growth. Generally, temperatures over 95°F (35°C) can be detrimental to tomato plants, regardless of their growth stage. When the temperature exceeds this level, the plant starts to shut down, and the aforementioned symptoms become more evident.

However, it is worth noting that the threshold for heat stress may vary depending on the cultivar. Some varieties are more tolerant to higher temperatures and can withstand heat up to 100°F (38°C). Others, however, can barely survive in temperatures over 85°F (29°C).

How to Protect Tomatoes from High Temperatures

If you live in an area with hot summers and want to grow tomatoes, there are several things you can do to protect your plants from high temperatures. These include:

Plant heat-tolerant varieties

Provide shade during the hottest parts of the day

Water the plants regularly

Provide adequate mulch to keep the soil cool

Prune the plants to reduce foliage and increase air circulation

Cover the plants with shade cloth

By following these measures, you can ensure that your tomato plants thrive even in hot weather conditions.

Conclusion

In conclusion, tomato plants require an optimal temperature range of 70°F to 85°F to thrive. When the temperature exceeds 95°F, tomato plants become stressed, and if not corrected, it can lead to reduced fruit production and overall plant damage. However, some cultivars can tolerate temperatures up to 100°F, so it is essential to know the optimal temperature range for your cultivar. By taking appropriate measures to protect your plants, you can have a bountiful harvest of delicious tomatoes, even during hot summer weather.