Temperatures That Are Too Low According to the United States Department of Agriculture Research Service, tomato plants are able to withstand temperatures as low as 33 degrees Fahrenheit, but they begin to experience issues when the temperature drops below 50 degrees F.
- The capacity of tomato plants to convert sunlight into sugars through the process of photosynthesis is hindered when nighttime temperatures drop below a certain threshold.
- The generation of pollen is inhibited when temperatures are low, which can lead to a reduction in fruit output or possibly the malformation of fruit.
When overnight temperatures dip below 60 degrees Fahrenheit, the blossom end of the fruit can develop a condition known as cat-facing, which consists of puckers, scars, and fissures.
What temperature will ruin tomatoes?
Damage caused to tomato and pepper fruit by low temperatures and freezing Temperatures that are too low can be harmful to the fruit of warm-season plants like tomatoes and peppers, for example. Tomato fruit is said to suffer damage from chilling if it is subjected to temperatures of 10 degrees Celsius for more than 14 days or temperatures of 5 degrees Celsius for more than 6 to 8 days.
Is 42 degrees too cold for tomato plants?
It is unusual to discover a vegetable garden that does not have at least some tomato plants. Tomatoes require abundant light, fertile soil, and warm temperatures in order to flourish as plants that produce an abundance of tomatoes that can be picked and eaten.
- The question is, then, what kind of weather conditions produce the best tomatoes.
- Is it too chilly for tomatoes to be outside when it’s 40 degrees at night? Tomatoes cannot tolerate temperatures below 40 degrees Fahrenheit at night, which increases the risk of crop failure.
- Tomatoes thrive in environments with daily temperatures ranging from 70 to 85 degrees Fahrenheit and nighttime temperatures ranging from 59 to 68 degrees Fahrenheit.
Temperatures at night that are too low (below 55 degrees) can stifle the production of pollen and retard the maturation of fruit. Gardeners may use the optimal temperature ranges for daytime and nighttime temperature to assist them estimate when the best time will be to sow seeds and set out transplants in their particular location.
At what temperature do tomatoes stop setting fruit?
Tomatoes have a tendency to cease manufacturing red pigments when temperatures continuously reach the 95-degree range, which implies that normally red fruits may instead develop into an orange color if the fruit is picked too early. When excessive heat persists, with days that are above 100 degrees Fahrenheit and nights that are over 80 degrees Fahrenheit, the majority of tomatoes will not mature at all.
Fruit that is allowed to mature on the plant may develop some color on its outside, but the flesh of the fruit may continue to remain green. If there is going to be a period of extremely high temperatures, you should bring any fruit that is already showing signs of ripeness indoors to continue ripening before picking it.
Because there is such a substantial amount of pine straw surrounding this tomato plant, you won’t have to water it as frequently. Once a heat wave has arrived, fruit that is ripening will fare better off the plant than it will while it is still on the plant. 
