Is 45 Degrees Too Cold for Tomato Plants?

Tomato plants are warm-weather crops and thrive in temperatures between 70 and 80 degrees Fahrenheit. But what happens if the temperature drops below 50 degrees, and it reaches 45 degrees or lower? Will the tomato plants survive?

The Effects of Cold on Tomato Plants

If the temperature drops to 45 degrees, tomato plants will experience stunted growth and slow development. Their leaves may turn yellow or brown, and they won't produce many blooms or fruit. If the temperature dips below 40 degrees, the plants will start to enter dormancy, their growth will stop, and they will eventually die.

It's important to note that the effects of cold on tomato plants can vary depending on the stage of growth. If the temperature drops during the seedling stage, the plants will not survive. Young tomato plants are prone to frost damage, and even a slight dip in temperature can kill them. Mature tomato plants, however, can survive brief periods of cold weather, but extended exposure to low temperatures will have negative effects.

How to Protect Tomato Plants from Cold Weather

Here are some tips to protect your tomato plants from cold weather:

Cover them with a frost blanket or cloth. This will provide some insulation and keep the warm air in.

Bring potted plants indoors or to a warmer location, such as a greenhouse.

Water the plants regularly. Moist soil retains heat better than dry soil.

Use mulch to cover the soil around the base of the plants. This will help regulate the temperature and keep the roots warm.

Avoid planting tomatoes too early in the season. Wait until the soil is warm and the weather is consistently above 50 degrees.

Conclusion

The bottom line is that 45 degrees is too cold for tomato plants to thrive. If the temperature drops below 50 degrees, tomato plants will experience stunted growth, slow development, and may eventually die. If you live in an area with a cooler climate, it's important to protect your tomato plants from the cold weather by using frost blankets, watering them regularly, and using mulch to keep the roots warm. With a little care and attention, you can help your tomato plants survive and thrive, even in colder temperatures.