Can Broccoli Survive Frost?

When the weather gets cold, we all want to know if our crops are going to survive. Broccoli is a hardy vegetable that will grow well in most climates, but what happens when it starts to get really cold? Can broccoli survive frost? How tolerant is it of extreme temperatures? And should you protect your broccoli from frost or let nature take its course?

Can Broccoli Survive Frost?

You can be confident that your broccoli will survive through the winter if you plant it in the fall. This is a cool-season vegetable, so its roots will not freeze as long as they’re covered with a thick layer of mulch or soil. Broccoli plants are very hardy and can survive temperatures as low as -10 degrees Celsius (14 degrees Fahrenheit).

Some gardeners have even had success growing broccoli in containers indoors throughout the winter months, though this can be challenging to maintain without access to sunlight or natural light from windows.

How Tolerant Is Broccoli To Cold Weather

Broccoli is a cold-hardy plant that does best in cool weather. Broccoli can tolerate temperatures from 26 to 31 degrees without any damage.

In order to keep broccoli alive during cold weather, the soil needs to be well-drained, with a pH between 5.8 and 6.8. The soil should also contain plenty of organic matter such as compost or manure because this will promote root growth and improve drainage.

Broccoli plants can be grown from seed or from transplants that have been started indoors in pots. Transplants should be set out when the weather warms up to about 65 degrees Fahrenheit, which typically occurs about two weeks after the last frost date in your area.

How To Protect Your Broccoli From Frost

There are a few options for keeping your broccoli safe from frost, depending on what type of garden space you have. You can:

  • Cover the plants with a frost cloth or light insulating material. This is the easiest way to protect them from cold air and moisture, but it won’t help if temperatures remain below freezing for several days in a row.
  • Move your plants inside an enclosed structure like a greenhouse or cold frame (a glass box with vents). This is effective only for small gardens—and only if you’re willing to sacrifice valuable growing space. It also requires regular watering in order to keep plants watered throughout the night as well as on sunny days when they’re outside.
  • Move your plants into an insulated area such as a polytunnel or other large tent structure specifically designed for this purpose (not recommended unless you already own one). If you don’t already have one, buying one can be expensive!

Caring For Broccoli During The Winter

Broccoli is a cool-season vegetable that will produce most of its crop in the fall, but it will continue to produce new heads throughout the winter if the plant receives proper care.

When it comes to caring for broccoli, there are a few things you should know.

Broccoli plants need plenty of water during the spring and summer months when they are actively growing. If you live in an area where there is no rain or snowfall during these times, you may need to water your garden daily.

However, once temperatures begin to drop in late fall and early winter, your broccoli plants will stop producing new heads because they’ll go into dormancy mode until spring arrives again.

During this time, watering is less important than keeping weeds at bay and providing adequate protection from the elements so that your plants don’t freeze or get damaged by frostbite. Mulching around the base of each plant with straw or shredded leaves will help insulate it from extremely cold temperatures while also preventing weeds from taking over your garden beds.

What Temperatures Will Kill Broccoli?

Broccoli is one of the hardiest vegetables and can tolerate colder weather than most other vegetables. However, when temperatures drop below 50 degrees Fahrenheit (10 degrees Celsius) for more than a few nights in a row and stay there for several days, this can damage the plant and cause it to die.

To prevent injury from cold weather, plant young seedlings in late summer or early fall so they have time to mature before winter arrives. You also want to make sure that your plants have enough water during this time since they need frequent watering when temperatures are cool or dropping into the 40s Fahrenheit (4-7 C).

Can I Overwinter Broccoli?

Broccoli is a cool-season vegetable that can be overwintered if the temperature is right.

To overwinter broccoli, start by planting seeds indoors in pots or trays in late winter or early spring. Make sure they are planted in a warm environment, such as under lights or near a sunny window where they will receive at least six hours of sunlight per day.

When the seedlings have two true leaves, transplant them into individual pots filled with potting soil and water them generously so that the soil is moist but not saturated. Cover each pot with plastic wrap and place them in an area that receives bright light but stays above 60 degrees F at night.

When temperatures warm up in spring, remove the plastic wrap from around your plants and move them outdoors into full sun for about three weeks before transplanting them into your garden bed. Space plants are about 12 inches apart so that they have room to grow once they reach maturity (about two months after transplanting).


We hope this article has helped you understand a little more about what to do with your broccoli during the winter. If you’re going to keep your broccoli outdoors, it’s important to protect them correctly. Prolonged exposure to frost will eventually kill the plant.