At What Temperature Does Frost Occur on Plants

At What Temperature Does Frost Occur On Plants

One major thing gardeners are worried about is the frost effect on their plants. You need to understand and be aware at what temperature does frost occur on plants to protect your plants. Having an idea of frost or freezing date in your zone can be quite helpful.

We will be enlightening you about what temperature frost occurs on plants. Also, we will give you some tips about what you can do to protect your vulnerable plant from frost damage.

Frost and What It Does to Plant

Frost is defined as a bunch of minute ice crystals that settle and form on solid objects or surfaces. This happens when the temperature drops and gets cold.

Frost will settle on your plants and form ice crystals in your plant cells. This will, in turn, harm your plant making water unavailable to your plant tissues. It will also cause disorder to the movement of water across your plant cells.

Frost and What It Does to Plant - At What Temperature Does Frost Occur on Plants

Frost will injure the leaves of your plants making them look soaked. They will make your plant leaves look wrinkled and turn black or dark brown.

At What Temperature Does Frost Occur on Plants

The temperature frost occurs on plants is 32 degrees Fahrenheit and below. However, in a few cases, it is possible for frost to occur on plants a little above 32 degrees Fahrenheit.

  • Light freeze or a light frost refers to the temperature that drops a few degrees or exactly 32 degrees Fahrenheit for just a couple of hours or a night. Some rugged or hardy plants can survive this.
  • Hard freeze or a hard frost occur when the temperature drops more below 28 degrees Fahrenheit for a long period. Most plants may end up damaged with a hard freeze.

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Temperature That Causes Frost Damage in Plant

For various plants, they experience frost damage at different temperatures. Here is a temperature table of when some vegetable plants get frost damage:


S/N Vegetable Plants Temperature (°F)
1 Spinach 30-32
2 Asparagus 30-31
3 Okra 29-30
4 Broccoli 29-30
5 Cabbage 26-28
6 Cucumbers 30-32
7 Carrots 28-30
8 Tomatoes 32-34
9 Sweet corn 32-33
10 Beans 31-32
11 Peas 28-30

Protecting Your Plants From Frost Damage

You need to devise some ways to protect your vulnerable plant from frost damage. Below are things you can do to protect your plants from frost:

  • Be enlightened about the weather forecast in your area especially when you observe the temperature is going to drop.
  • Protect your tender and vulnerable plants by covering them with plastic sheets, blankets, row covers, bedsheets, and so on. Take off the covering whenever the temperature rises so your plant can receive sunlight.
  • You can as well put an outdoor lamp of 100-watt to reduce frost damage and keep your plant warm in extreme cases.
  • Also, water the soil of your plant deeply and thoroughly. This way, the wet soil will conserve some heat and warm the root of your plant thereby protecting your plant from frost injury.


Final Note

Have in mind that frost won’t only hit during winter, frost can occur during fall or spring in some zones. This is why you need to take some precautions to avoid frost damage to your plant.