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What you do with clematis in the winter is simple: you protect the roots, prune according to type, and leave the rest to nature.
Most clematis are surprisingly hardy, but a little winter care goes a long way in ensuring a spectacular spring bloom.
If you’ve ever wondered what you do with clematis in the winter to keep them safe from frost and ready to flower, you’re in the right place.
In this post, we’ll cover everything you need to know about winterizing clematis, including mulching, pruning, and when to simply leave them alone.
Let’s dig in.
What You Do With Clematis in Winter Depends on the Variety
The first thing to understand is that what you do with clematis in winter depends heavily on which type you’re growing.
Clematis fall into three pruning groups, and each group has different winter needs.
Knowing your group is the single most important step for proper winter care.
Here’s how the groups break down:
Group 1 Clematis: Early Bloomers
Group 1 clematis bloom in early spring on old wood, meaning last year’s growth.
Because they flower so early, what you do with clematis in winter for Group 1 is very minimal.
You should not prune them in winter at all.
Pruning now would remove the flower buds that are already set for spring.
Instead, just tidy up any dead or broken stems and let them be.
These varieties, like the evergreen Clematis armandii, need protection from harsh winds more than anything.
Group 2 Clematis: Large-Flowered Hybrids
Group 2 clematis are the big, showy hybrids that bloom in late spring and sometimes again in late summer.
They flower on both old and new wood.
What you do with clematis in winter for Group 2 is a light prune.
You can cut back the top growth by about a foot to tidy them up.
But be careful not to cut too hard, as you’d risk sacrificing the first big flush of flowers.
Mulching the base is the most critical task here to protect the roots.
Group 3 Clematis: Late Bloomers
Group 3 clematis bloom in summer and autumn on new wood.
These are the easiest when it comes to winter care.
For Group 3, what you do with clematis in winter is cut them back hard, almost to the ground.
Leave about 12 to 18 inches of stem above the soil line.
Because they only flower on new growth, this hard prune ensures vigorous, healthy shoots and tons of flowers next year.
First, Mulch the Roots to Protect Them From Frost
Regardless of which group you have, the most universal answer to what you do with clematis in winter is to mulch.
Clematis roots are surprisingly sensitive to freezing and thawing cycles.
Even though the vine itself can handle freezing temps, the roots are not as tough.
Here’s how to protect them:
Why Root Protection Is Non-Negotiable
Clematis plants like their roots cool and shaded, even in summer.
In winter, that same preference means the roots need insulation from extreme cold.
If the soil freezes and thaws repeatedly, it can heave the roots out of the ground.
This exposes them to drying winds and fatal damage.
So, mulching is your best defense against temperature swings.
What Mulch to Use and How Deep
A thick layer of organic mulch is perfect for winterizing your clematis.
Good options include shredded bark, straw, compost, or even fallen leaves.
Apply a 3 to 4 inch layer around the base of the plant.
Make sure to spread it out in a circle that’s about 18 to 24 inches wide.
This covers the shallow root system that radiates outward from the crown.
But don’t pile the mulch directly against the stems, as that can cause rot.
When to Apply the Winter Mulch Here
Wait until the ground has started to freeze before you apply a deep winter mulch.
If you mulch too early, you might invite rodents to nest in the warm, dry layers.
Once the first hard frost hits, that’s your signal to add the protective layer.
This simple step is arguably the most important part of what you do with clematis in winter.
Pruning in Late Winter or Early Spring
Now, here’s where a lot of gardeners get confused.
Most pruning for clematis should actually happen in late winter or very early spring, not in the dead of winter.
So, what you do with clematis in winter often involves waiting until the worst of the cold is over.
This timing is crucial because it allows you to see which stems survived and which are dead.
Why Waiting Is the Right Call for Group 1 & 2
For Group 1 and 2 clematis, winter pruning is a big no-no.
The flower buds for spring are already formed on the existing wood.
If you prune now, you’re literally cutting off your flowers.
Instead, wait until the buds begin to swell here in late winter.
Then, you can safely remove dead or damaged stems just above a healthy set of buds.
Group 3 Clematis: The Hard Cut
For Group 3 clematis, you can do the hard cut in late winter without any fear.
Because they bloom on fresh growth, cutting them down is safe.
You can do this as early as late February or as late as early April.
Just cut all stems back to about a foot above the ground.
This encourages the plant to send up strong, new shoots from the base.
So, what you do with clematis in winter for these is actually a preparation for this quick spring haircut.
The “Deadhead” Option
Another task you might consider is a simple tidy-up.
In late winter, you can remove any old seed heads and brittle stems that are still hanging on.
This keeps the plant looking neat and reduces the risk of fungal diseases.
It’s a light touch that doesn’t interfere with flowering.
Extra Protection for Harsh Climates
If you live in a zone with brutal, freezing winters, you might need to go beyond mulching.
What you do with clematis in winter in cold regions can include wrapping or covering.
This is especially true for the less hardy evergreen types.
Here are some extra steps to consider:
Wrap the Base with Burlap
You can wrap the lower portion of the clematis stems with burlap.
This provides a windbreak and extra insulation.
Just wrap a few layers around the base and tie them loosely.
This is excellent for potted clematis or young plants that aren’t established yet.
Protect Potted Clematis
Clematis grown in containers are much more exposed to cold.
Their roots are above ground and have less soil to insulate them.
For potted clematis, the best thing to do in winter is move the pot against a south-facing wall.
Better yet, sink the entire pot into the ground if possible.
If not, wrap the pot with bubble wrap or hessian to insulate the roots.
What you do with clematis in winter for containers is basically giving them a warm coat.
Don’t Forget About Watering
During dry winter spells, clematis can still suffer from dehydration.
Even though the plant is dormant, roots can dry out in freezing winds.
On days when the soil is thawed and the sun is out, give the base a gentle water.
Just avoid watering when the ground is frozen solid, as this can create ice layers on the roots.
So, What Do You Do With Clematis in Winter?
What you do with clematis in winter is protect the roots with mulch, prune according to your specific group in late winter, and shield them from the harshest elements.
It’s a simple, straightforward process that yields big rewards.
By knowing your clematis group and taking these few protective steps, you’ll ensure a stunning and vibrant display come spring.
Hope this post has helped you figure out exactly what you need to do with your clematis this winter.
Happy gardening, and here’s to a beautiful bloom season ahead!