Can Tomato Plants Survive Cold Temperatures?

Tomato plants are a staple in many gardens, and they require specific temperatures and conditions to thrive. One common concern amongst gardeners is whether or not tomato plants can survive cold temperatures. The answer is...it depends! Let's dive into the details.

The Basics: What Temperature do Tomato Plants Need?

Tomato plants thrive in temperatures that range from 70-80 degrees Fahrenheit during the day and 60-70 degrees Fahrenheit at night. These ideal temperatures help encourage healthy growth of tomato plants, leading to more substantial yields, and overall healthier plants.

But what happens if the temperatures drop below this range? If temperatures fall below 55 degrees Fahrenheit at night, and 35 degrees Fahrenheit during the day, tomato plants can suffer from cold stress.

What is Cold Stress?

Cold stress occurs when temperatures dip too low for a tomato plant to handle. This condition slows down or even stops the plant's metabolism, which can ultimately lead to stunted growth and death. The most common symptom of cold stress is a change in leaf color, turning from dark green to purple or yellow.

Other common symptoms of cold stress include:

Leaf curling

Leaf drop

Wilted foliage

Stunted growth

How Cold is Too Cold for Tomato Plants?

As previously mentioned, tomato plants require specific temperatures to grow correctly. When temperatures drop below 55 degrees Fahrenheit at night and 35 degrees Fahrenheit during the day, cold stress can occur. This temperature range is often referred to as the "cold threshold" for tomato plants.

However, it's crucial to note that an extended period of exposure to temperatures below the cold threshold can cause irreversible damage to the plant.

How to Protect Your Tomato Plants from Cold Weather?

Now that we know the dangers of cold weather on tomato plants, let's discuss how to protect them from the cold. Here are a few tips to keep your tomato plants safe:

Cover your plants with blankets or tarps when the temperature drops below 55 degrees Fahrenheit at night.

Water your plants adequately before colder weather, as healthy plants resist cold stress better.

Put a layer of plastic or fleece to provide additional insulation for the plants.

Bring your tomato plants inside or move them to a warmer location, such as a greenhouse or sunroom.

In Conclusion: Yes, Tomato Plants can Survive the Cold....to an extent!

With adequate care and attention, tomato plants can withstand cold temperatures. It's essential to keep an eye on the temperature and take action when temperatures drop below the cold threshold. Remember that when temperatures remain too cold for too long, it can cause irreversible harm to your tomato plants.

So, the next time cold weather is on the horizon, take precautions to protect your tomato plants by following the above tips.