What Temperature at Night is Safe for Tomato Plants?

Tomato plants are one of the most popular vegetables grown in gardens around the world. These plants require warm temperatures, adequate sunlight, and water to grow and produce fruit. However, the temperature has a significant impact on the growth and productivity of tomato plants. Gardeners need to understand the safe temperature range for tomato plants, especially at night, to avoid damaging the plants.

The Optimal Temperature Range for Tomato Plants

The optimal temperature range for tomato plants is between 70 and 85 degrees Fahrenheit. The plant grows best in warm weather with plenty of sunshine, which allows them to develop their fruit. Tomato plants can tolerate temperatures up to 90 degrees Fahrenheit, but this temperature can cause fruit drop, delayed fruit ripening, and poor fruit quality.

The Effect of Nighttime Temperatures on Tomato Plants

The temperature at night is critical to the growth and development of tomato plants. Unlike daytime temperatures, nighttime temperatures should not vary too much from the optimal range of 60 to 70 degrees Fahrenheit. An increase or decrease in nighttime temperatures can negatively impact the plant.

Temperatures below 55 degrees Fahrenheit can cause the leaves to turn yellow or even brown, while temperatures above 75 degrees Fahrenheit can cause the blossoms to drop, stunting the growth of the fruit. In both cases, the yield of the tomato plant will be negatively impacted.

Strategies to Protect Tomato Plants from Extreme Temperatures at Night

Gardeners should take steps to protect their tomato plants from extreme temperatures, especially at night. Here are some strategies to follow:

Cover tomato plants with frost blankets or fabric to shield them from cold temperatures

Water the tomato plants during the day to heat up the soil, which can provide warmth to the roots at night

Plant tomatoes near south-facing walls or structures that can absorb heat and radiate warmth during the night

Avoid overwatering tomato plants, as overly damp soil can reduce soil temperature

Conclusion

Tomato plants are sensitive to temperature changes, and gardeners need to be aware of the safe temperature range for their growth and yield. The optimal temperature range for tomato plants is between 70 and 85 degrees Fahrenheit, with a nighttime temperature of 60 to 70 degrees Fahrenheit. Gardeners can protect their tomato plants from extreme temperatures by employing strategies like covering the plants with blankets, watering them in the morning, planting them near a south-facing wall, and avoiding overwatering.