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With asparagus fern in winter, you have a few solid options to keep it happy, and your approach mainly depends on your climate and whether your plant lives indoors or outside.
If you’re wondering what to do with asparagus fern in winter, the short answer is to protect it from cold, cut back on watering, and decide whether to overwinter it indoors or let it go dormant outside in warmer zones.
Asparagus fern isn’t actually a true fern, but that doesn’t change how you care for it during the chilly months.
In this post, we’ll walk through exactly what to do with asparagus fern in winter so yours comes back strong in spring.
Let’s dig in.
What to Do With Asparagus Fern in Winter
What to do with asparagus fern in winter comes down to understanding one key fact: this plant hates the cold.
Asparagus fern is hardy in USDA zones 9 through 11, which means anything below freezing can damage or kill it.
So the first thing to figure out is whether your asparagus fern is staying outside or coming indoors.
If you live in zone 9 or warmer, your asparagus fern in winter can usually stay in the ground with a little mulch for protection.
But if you’re in zone 8 or colder, you’ll need to bring your asparagus fern indoors before the first frost hits.
1. Bring It Indoors Before Frost
The most important thing to do with asparagus fern in winter is to move it inside before temperatures drop below 50°F.
Asparagus fern foliage turns yellow and drops quickly once cold stress sets in.
So keep an eye on your local forecast and bring your asparagus fern in early rather than waiting.
2. Treat It as a Houseplant
Once indoors, your asparagus fern in winter basically becomes a houseplant.
Place it near a bright window with indirect light so it stays green and healthy.
Avoid drafty spots near doors or heating vents because dry, fluctuating air stresses the plant.
How to Care for Asparagus Fern in Winter Indoors
Caring for asparagus fern in winter indoors requires a few adjustments compared to the growing season.
The plant slows down during winter, so it needs less of almost everything.
Here’s how to handle the basics.
1. Water Less Often
Your asparagus fern in winter needs far less water than in summer.
Let the top inch of soil dry out before watering again.
Overwatering is the number one killer of asparagus fern in winter because soggy roots rot fast in cool indoor conditions.
2. Boost Humidity
Indoor heating dries out the air, and asparagus fern loves humidity.
Mist your asparagus fern every few days or set the pot on a tray of pebbles with water.
This keeps the fronds from turning crispy while your asparagus fern overwinters inside.
3. Skip the Fertilizer
Don’t feed your asparagus fern in winter.
The plant is resting, so fertilizer just builds up in the soil and can burn the roots.
Wait until spring when you see new growth before feeding your asparagus fern again.
4. Watch for Pests
Indoor conditions can attract spider mites and mealybugs to your asparagus fern in winter.
Check the undersides of the fronds regularly and wipe them down if you spot anything.
A quick shower in the sink also helps keep your asparagus fern clean and pest-free.
Overwintering Asparagus Fern Outdoors
If you live in a warm climate, overwintering asparagus fern outdoors is totally doable.
Your asparagus fern in winter will stay evergreen in zones 9 to 11 with minimal fuss.
Here’s what to do if yours stays outside.
1. Add a Layer of Mulch
Spread two to three inches of mulch around the base of your asparagus fern before winter.
This insulates the roots and helps your asparagus fern survive occasional cold snaps.
2. Reduce Watering
Even outdoors, your asparagus fern in winter needs less water.
Water only when the soil feels dry, and never let the plant sit in soggy ground.
3. Protect From Frost
If a rare frost is coming, drape a sheet or frost cloth over your asparagus fern.
Remove it in the morning so the plant can breathe.
This small step can save your asparagus fern from serious cold damage.
Should You Prune Asparagus Fern in Winter?
Light pruning is fine, but heavy trimming should wait until spring.
If your asparagus fern in winter has yellow or dead fronds, go ahead and snip them off.
Just don’t cut back healthy growth because the plant needs those fronds to store energy.
Save the major pruning for early spring when your asparagus fern starts pushing out new growth.
So, What to Do With Asparagus Fern in Winter?
What to do with asparagus fern in winter really comes down to protecting it from cold and adjusting your care routine.
Bring your asparagus fern indoors before frost if you live in a colder zone, or mulch it well if you’re in a warm climate.
Water less, skip fertilizer, boost humidity indoors, and keep an eye out for pests.
Do these things and your asparagus fern in winter will stay healthy and ready to thrive again in spring.
With the right winter care, your asparagus fern will reward you with lush, feathery growth for years to come.