Do Asparagus Ferns Freeze

Asparagus ferns do freeze, and unfortunately, they don’t survive it.
 
If you’ve been asking yourself, “do asparagus ferns freeze?” the short answer is yes, and cold temperatures can seriously damage or kill them.
 
Asparagus ferns are tropical plants at heart, so they absolutely hate the cold.
 
While they look tough and feathery, they’re not built for frost, ice, or freezing temperatures.
 
In this post, we’ll explore whether asparagus ferns freeze, what happens when they do, and how you can protect them when the temperature drops.
 
Let’s get into it.

Do Asparagus Ferns Freeze? Yes, and Here’s What Happens

Asparagus ferns do freeze when exposed to temperatures at or below 32°F (0°C).
 
And when asparagus ferns freeze, the damage can be quick and severe.
 
These plants are native to warm, humid regions, so they have no natural defense against frost.
 
Once the temperature drops low enough, the water inside their cells turns to ice.
 
That ice expands and ruptures the cell walls, which is what causes that mushy, blackened look after a freeze.
 
So if you’re wondering, “will my asparagus fern freeze?” the answer is a definite yes if it’s left out in freezing weather.

1. What Temperature Kills an Asparagus Fern?

Asparagus ferns freeze and start suffering damage at around 32°F.
 
A light frost can burn the tips and turn the fronds yellow or brown.
 
A hard freeze below 28°F can kill the entire plant down to the soil line.
 
If the roots freeze solid, the asparagus fern usually won’t come back.

2. Why Asparagus Ferns Are So Vulnerable to Freezing

Asparagus ferns aren’t true ferns, and they aren’t cold-hardy either.
 
Their thin, needle-like stems hold a lot of water, which freezes fast.
 
They also lack the waxy cuticles and antifreeze proteins that cold-climate plants use for protection.
 
That’s why asparagus ferns freeze so easily compared to plants like ivy or boxwood.

3. Signs Your Asparagus Fern Has Frozen

After a freeze, your asparagus fern will let you know it’s unhappy.
 
The fronds droop, turn dark green, then black, and feel soft or slimy.
 
You might also see crispy brown edges on the outer stems.
 
If the asparagus fern has frozen only on top, the roots might still be alive.
 
But if the soil froze too, the whole plant is likely a goner.

Can an Asparagus Fern Recover After Freezing?

An asparagus fern can recover after freezing, but only if the roots survived.
 
If only the foliage froze, you can cut back the dead stems and wait for new growth.
 
But if the asparagus fern froze all the way through the pot, recovery is unlikely.

1. How to Check If the Roots Are Still Alive

Scratch the surface of a stem near the soil.
 
If you see green underneath, the asparagus fern still has life in it.
 
You can also gently dig up a small section of roots.
 
Healthy roots are firm and white, while frozen roots are brown and mushy.

2. Steps to Help a Frozen Asparagus Fern Recover

Move the asparagus fern indoors or to a warm spot right away.
 
Trim off all the blackened, mushy stems with clean scissors.
 
Water lightly, but don’t soak the soil, since damaged roots rot easily.
 
Keep it in bright, indirect light and wait a few weeks for new shoots.
 
If the asparagus fern was frozen badly, it may take a full season to bounce back.

3. When to Give Up and Start Over

If the soil froze solid and the roots are mushy, it’s time to say goodbye.
 
An asparagus fern that has frozen completely won’t regrow from dead roots.
 
In that case, you’re better off replacing it with a new plant.

How to Protect Asparagus Ferns From Freezing

The best way to keep asparagus ferns from freezing is to bring them inside before the first frost.
 
If you can’t move them indoors, here are a few tricks to help them survive.

1. Move Potted Asparagus Ferns Indoors

This is the easiest and most reliable method.
 
Bring your asparagus fern inside when nighttime temperatures dip below 50°F.
 
Place it near a sunny window and keep it away from cold drafts.

2. Use Frost Blankets or Cloches Outdoors

For asparagus ferns planted in the ground, cover them with a frost blanket.
 
You can also use a cloche or a upside-down bucket for small plants.
 
Just make sure the cover doesn’t touch the foliage, or the leaves will still freeze.

3. Water Deeply Before a Freeze

Moist soil holds heat better than dry soil.
 
Water your asparagus fern the day before a freeze is expected.
 
But don’t overwater, because soggy roots are more likely to freeze and rot.

4. Add a Layer of Mulch

Mulch acts like a blanket for the roots.
 
Pile 3 to 4 inches of straw or shredded leaves around the base of the asparagus fern.
 
This won’t stop the top from freezing, but it can save the roots.

So, Do Asparagus Ferns Freeze?

Asparagus ferns do freeze, and freezing temperatures can kill them if you’re not careful.
 
These tropical plants have no tolerance for frost, and once their cells freeze, the damage is often permanent.
 
The good news is that you can protect asparagus ferns from freezing by moving them indoors, covering them, or mulching the roots.
 
And if your asparagus fern does freeze, there’s a chance it can recover if the roots stayed warm.
 
So keep an eye on the forecast and don’t let your asparagus fern freeze.