Your Cool Home is supported by its readers. Please assume all links are affiliate links. If you purchase something from one of our links, we make a small commission from Amazon. Thank you!
Cilantro can withstand light frost, but only to a certain point.
If you’ve been wondering whether cilantro can withstand frost, the short answer is yes, it can handle a light frost for a short time, but a hard freeze will kill it.
Cilantro is a cool-season herb that actually prefers cooler weather over intense summer heat.
But frost tolerance has limits, and understanding those limits helps you protect your crop.
In this post, we’ll look at how well cilantro can withstand frost, what temperatures damage it, and how to keep your plants alive when the cold rolls in.
Let’s dig in.
Can Cilantro Withstand Frost? Here’s What Happens
Yes, cilantro can withstand frost, but the extent depends on how cold it gets and for how long.
Cilantro is hardy in USDA zones 2 through 11, which means it’s built for cooler conditions.
Light frost, usually when temperatures dip between 28°F and 32°F, is something cilantro can withstand without major damage.
The leaves might get a little limp or show some minor browning, but the plant usually bounces back once the sun comes up.
However, when temperatures drop below 25°F, cilantro can’t withstand frost of that intensity.
A hard freeze will freeze the water inside the plant’s cells, and that’s what causes real damage.
Once that happens, the leaves turn mushy, dark, and eventually die.
So yes, cilantro can withstand frost in mild doses but not a deep freeze.
1. Light Frost Is Usually Fine
When a light frost hits, cilantro can withstand it with minimal issues.
Temperatures in the low 30s might cause some leaf tips to curl or turn slightly brown.
But the plant’s root system stays intact, and new growth often appears once the weather warms up again.
This is why many gardeners in cooler climates grow cilantro through fall and even into early winter.
2. Hard Freeze Kills Cilantro
A hard freeze is a different story.
When the temperature drops below 25°F and stays there for hours, cilantro can’t withstand frost of that severity.
The cell walls rupture as ice crystals form inside the leaves and stems.
You’ll notice the plant turns dark and slimy within a day or two.
Once that happens, there’s no bringing it back.
3. Established Plants Handle Cold Better
Mature cilantro plants can withstand frost better than young seedlings.
That’s because older plants have deeper roots and thicker cell structures that offer more protection.
If you’re growing cilantro from seed in late summer, by the time frost arrives, the plants should be established enough to survive a light freeze.
Seedlings, on the other hand, are more vulnerable and may not survive even a light frost.
How Cold Is Too Cold for Cilantro?
The threshold for when cilantro can withstand frost vs. when it can’t is around 25°F.
Above that, cilantro can withstand frost with some cosmetic damage but overall survival.
Below that, the plant is in serious danger.
Soil temperature matters too.
If the ground freezes solid, the roots die even if the air temperature wasn’t that low.
Mulching around the base of the plant helps insulate the soil and gives cilantro a better chance to withstand frost.
1. Watch the Forecast Closely
The best way to know if your cilantro can withstand frost on any given night is to check the forecast.
If temperatures are predicted to stay above 28°F, you’re probably fine.
If they’re dropping to 25°F or lower, it’s time to act.
2. Use Row Covers or Cloches
A simple row cover or cloche can make a big difference.
These tools trap heat from the soil and keep the air around your cilantro a few degrees warmer.
That extra warmth can be the difference between a plant that can withstand frost and one that doesn’t make it.
3. Harvest Before a Hard Freeze
If you know a hard freeze is coming, harvest your cilantro ahead of time.
You can cut the leaves and store them in the fridge or freeze them for later use.
That way, even if the plant can’t withstand frost, you still get to enjoy your harvest.
Tips to Help Cilantro Withstand Frost
If you want to push your cilantro’s cold tolerance as far as possible, here are a few practical tips.
Water the plants deeply the day before a frost.
Moist soil holds heat better than dry soil, and that warmth radiates upward overnight.
Avoid pruning or harvesting right before a frost.
Wounds on the plant make it more vulnerable to cold damage.
And if you’re growing cilantro in containers, move them indoors or against a south-facing wall for extra protection.
1. Mulch Around the Base
A layer of straw or shredded leaves around the base of your cilantro helps insulate the soil.
This keeps roots warmer and helps the plant withstand frost more effectively.
2. Choose Cold-Hardy Varieties
Some cilantro varieties are bred for better cold tolerance.
Look for slow-bolting types like ‘Santo’ or ‘Calypso’ if you’re growing in a region with early frosts.
3. Plant in Protected Spots
Cilantro grown near a wall or fence benefits from radiant heat.
That microclimate can be several degrees warmer than an open garden bed, helping cilantro withstand frost when other plants can’t.
So, Can Cilantro Withstand Frost?
Cilantro can withstand frost, but only light frost and only for short periods.
Once temperatures drop below 25°F, cilantro can’t withstand frost anymore and will likely die.
If you’re expecting a mild frost, your cilantro should pull through with minimal damage.
But for a hard freeze, harvest what you can and prepare to replant in spring.
With the right protection, you can stretch your growing season and keep enjoying fresh cilantro even when the cold sets in.