Can Romaine Lettuce Survive Frost?

If you have a garden, one of the most stressful times is when a frost comes along and threatens your crops. Every year, many gardeners lose their entire harvest to frost. If you grow romaine lettuce in your garden, are there things you can do to protect it from frost? And if so, how far into winter can it survive? We’ll take a look at how frost affects romaine lettuce and what steps you can take to protect your crop from cold weather.

Can Romaine Lettuce Survive Frost?

Romaine lettuce is a hardy plant and can survive frost, but it will still be damaged by it.

Frost damages the leaves and stems of romaine lettuce, but the roots will survive underground. The next time you’re craving a salad, don’t worry if there are frost warnings in your area; just wait until the danger passes (and make sure to cover your plants in plastic during the night), then harvest your bounty!

How Tolerant Is Romaine Lettuce To Cold Weather

Romaine lettuce is one of the hardiest species of lettuce, which makes it a good choice for growing in cold weather. In fact, romaine lettuce can survive temperatures down to -10°F (USDA Hardiness Zone 3), although it will die at temperatures below -20°F.

That said, there are several other types of lettuce that are even colder tolerant than romaine. Iceberg and red leaf lettuces are able to withstand even lower temperatures: they’re both rated as hardy down to -40°F!

How To Protect Your Romaine Lettuce From Frost

The cold weather has arrived and that means a lot of us are looking for ways to protect our plants from frost. There are many different products available to help keep your plants warm, but I prefer using old-fashioned methods. Here are some tips on how to protect your romaine lettuce from frost:

1. Place a small piece of plastic over the plant. This will block out any wind and help insulate the plant.

2. Wrap burlap around the base of the plant, securing it with staples or tape. The burlap will absorb any moisture coming off of your plants and prevent them from touching their leaves.

3. Create an artificial greenhouse effect by placing your plants in a cardboard box with holes cut into it for ventilation and add soil up to just below where you want them to grow so they can be protected from extreme temperatures without getting watered too much because they’re sitting in water (which could cause root rot).

You can also use plastic containers instead of cardboard boxes if you have them available; just make sure that there are holes cut into them for air circulation so that mold doesn’t develop in them!

Caring For Romaine Lettuce During The Winter

It can be difficult to find fresh produce in the winter months. Romaine lettuce is one of the few vegetables that are in season year-round, but it can be tricky to care for during the colder months. Here are some tips on growing romaine lettuce indoors during the winter months:

Put your seedlings in a sunny spot. If you’re starting out with seedlings, make sure they get plenty of light. This will help them grow faster and stronger.

Keep them watered. You don’t want your romaine lettuce to dry out, so make sure you water it regularly and keep it well-watered at all times.

Add fertilizer when needed. If you’re using a soil-based system, add some fertilizer once every two weeks or so to give your plants a boost of nutrients and help them thrive.

What Temperatures Will Kill Romaine Lettuce?

As a cold-tolerant vegetable, romaine lettuce can handle a light frost. But if temperatures drop below freezing, it will die.

You’ll know you have a problem when the outer leaves of your romaine lettuce turn brown and wilt. The plant will also stop growing new leaves as its root system becomes damaged from freezing soil.

There is one caveat: if you live in an area with fairly mild winters (about 32 degrees Fahrenheit or less), then it may be possible for most varieties of romaine lettuce to survive even if they’re left unprotected during the winter months.

However, even if it does survive the cold temperatures, sudden temperature changes could still cause damage to your plant’s roots and lead to early death later on in spring or summer once warmer weather returns again.

Can I Overwinter Romaine Lettuce?

You may be wondering whether romaine lettuce can survive a frost. The answer is yes—but not without some preparation. Romaine lettuce is a cold-hardy plant, but it does not tolerate freezing temperatures, as well as other types of lettuce do. If you live in an area where winter temperatures dip below freezing and your romaine plants are still growing, you should prepare them for the transition from summer to fall by protecting them from frost damage with row covers or mulching them heavily around their bases before the ground freezes solid.

Romaine lettuce is best grown in temperate climates that have mild winters and cool summers; however, if you live somewhere with those conditions and want to grow your own greens through the winter months, it’s possible! In fact, many gardeners choose this variety because they enjoy being able to harvest fresh greens throughout most of the year—even when snow blankets their gardens! To get started growing your own romaine lettuce over winter:

  • Choose an area that will get at least 6 hours of sunlight each day (ideally 8+) so that the plant has enough energy to produce its delicious leaves
  • Plant seeds directly into the soil once temperatures reach 65 degrees Fahrenheit (or 20 degrees Celsius) during the springtime  (planting earlier than this could result in failure due to frost damage)


It’s important to protect your lettuce from the cold, but you can also overwinter it. The key is to control humidity and temperature. You can do this by covering the plants with a cloth or plastic sheet, bringing them indoors during frosty weather, and keeping them in a cool area like an unheated basement where they will not freeze but still get enough moisture from condensation.