What Temperature Will Kill a Tomato Plant?

Tomatoes are a popular crop for gardeners and farmers alike. However, they are also susceptible to damage from extreme temperatures. So what temperature will kill a tomato plant?

The Optimal Temperature Range for Tomato Plants

Tomatoes are warm-season plants and prefer temperatures in the range of 65-85°F (18-29°C). Temperatures outside of this range can cause damage to the plant's growth and fruit production. If temperatures drop below 55°F (13°C), tomato plants may experience stunted growth and slow fruit development. When the temperature rises above 95°F (35°C), the tomato plant may also suffer from heat stress, leading to fewer fruits and reduced quality.

Frost and Freezing Temperatures

Tomato plants are tender and cannot tolerate frost or freezing temperatures. When the temperature drops below 32°F (0°C) for an extended period, the water inside the tomato plant's cells freezes, damaging the cell walls and causing them to burst. The result is wilting, browning, and ultimately, death of the plant.

Protecting Tomato Plants from Cold Weather

To protect tomato plants from cold weather, cover them with a blanket or tarp to retain warmth. You can also add a layer of mulch around the base of the plant to insulate the roots. If the temperatures are expected to drop below freezing, consider using a frost cloth or other protective fabric to cover the plant.

Heat Stress and High Temperatures

While tomato plants prefer warm temperatures, they can suffer from heat stress when the temperature rises above 95°F (35°C). Symptoms of heat stress include wilted leaves, dropped blossoms, and poor fruit quality. To protect tomato plants from high temperatures, provide shade by using a shade cloth or planting near a fence or wall that provides partial shade. You can also water the plants more frequently to keep the soil moist and cool.

Conclusion

Tomato plants are susceptible to damage from extreme temperatures, with frost and freezing temperatures being the most harmful. To protect your tomato plants from cold weather, cover them with a blanket, tarp, or protective cloth. If the temperatures are too high, provide shade and keep the soil moist. By following these tips, you can avoid losing your tomato plants to temperature extremes.