This post contains affiliate links. As an Amazon Associate I earn from qualifying purchases. If you click a link and make a purchase, I may receive a small commission at no extra cost to you.
Clematis is fast growing, and in many cases, it’s one of the quickest vines you can plant in your garden.
If you’ve been wondering whether clematis is fast growing enough to cover a trellis or hide an ugly fence within a single season, the answer is a confident yes for most popular varieties.
You’ll find that clematis is fast growing when given the right soil, sunlight, and consistent moisture, and some types can put on several feet of new growth in just a few weeks.
In this post, we’ll dig into why clematis is fast growing, which varieties truly live up to that reputation, and the simple care tips that keep these vines racing upward.
Let’s get those tendrils climbing.
Why Clematis Is Fast Growing
Clematis is fast growing because of its unique climbing strategy and its ability to channel energy into rapid stem extension.
Unlike shrubs that spend energy thickening their trunks, clematis focuses on producing long, flexible stems that latch onto supports with their leaf stalks.
This growth habit means the vine can shoot upward quickly, especially in the warm months when temperatures and daylight hours are ideal.
Here are the main reasons you can count on clematis being fast growing in your yard.
1. The Right Root System Pushes Quick Shoots
Clematis has a fibrous root system that establishes quickly when planted correctly.
Once those roots settle in, they pump water and nutrients straight into the growing tips, which is exactly why clematis is fast growing from mid-spring onward.
If you give the root zone a cool, shaded spot while the top of the vine basks in the sun, you’ll double the speed of your clematis growth.
2. Twisting Leaf Stalks Keep Momentum Going
Clematis vines climb by wrapping their leaf stalks around thin supports like twine, wire, or netting.
This allows them to grow continuously without needing heavy, woody support like some other vines.
That’s why clematis is fast growing on trellises and obelisks, since the vine can grip and climb with very little effort.
You’ll see new tendrils reaching out every few days once the growing season kicks off.
3. Annual Pruning Triggers Explosive New Growth
When you prune clematis correctly for its group, you force the plant to send out fresh, vigorous shoots from the base.
This is another reason clematis is fast growing, because hard pruning in late winter or early spring wakes the vine up and encourages rapid regrowth.
Many gardeners are shocked to see their clematis go from a few bare stems to a bushy, five-foot vine in under two months after a good prune.
4. Generous Feeding Fuels the Speed
Clematis is a hungry plant, and feeding it directly accelerates how fast it grows.
A balanced fertilizer high in potassium and phosphorus, applied in spring and again mid-summer, supplies the energy needed for stems to stretch and buds to form.
That’s why clematis is fast growing when it gets regular meals, but it will slow down noticeably if you skip feedings.
Which Clematis Varieties Are The Fastest Growers
Not all clematis is fast growing, so picking the right variety matters if speed is your goal.
Some types, especially the large-flowered hybrids, grow at a moderate pace, while others can absolutely rocket up a fence.
Here are the best clematis options when you want clematis growth that you can actually measure week to week.
1. Clematis Armandii
Clematis armandii is fast growing and evergreen, meaning it keeps its leathery leaves all year.
In a single growing season, this vigorous climber can easily cover 15 to 20 feet of wall or trellis space.
If you need to hide something quickly, armandii is one of the fastest clematis vines you can buy.
2. Clematis Montana
Montana clematis is fast growing to the point of being almost rampant in the right climate.
It produces a massive flush of small flowers in late spring, and the vine itself grows up to 30 feet in a single year.
Montana is your pick if you want a dramatic, quick cover for pergolas and large structures.
3. Clematis Tangutica
Tangutica, the golden clematis, is fast growing and also very tough.
It will climb or scramble over shrubs, fences, and even rocky slopes, adding about 10 to 15 feet of new growth annually.
The cheerful yellow lantern-shaped flowers add bonus color while the vine works hard to fill its space.
4. Clematis Vitalba (Wild Clematis)
Vitalba, sometimes called old man’s beard, is fast growing in almost any soil type.
In the wild, it can grow an astonishing 15 to 20 feet per year, and in a managed garden it’s just as eager.
Just be careful with vitalba, because it can become invasive if you let it run wild.
How To Make Clematis Grow Even Faster
So now you know clematis is fast growing, let’s talk about how to push it to its maximum speed.
A few simple tricks can take your clematis from average performance to truly explosive growth.
1. Plant It Deep, Keep the Roots Cool
Clematis prefers its roots in shade while its top growth reaches for full sun.
You can plant clematis six inches deeper than the pot level, and then cover the root zone with mulch or a low-growing plant.
This keeps the soil cool and moist, which is exactly why clematis is fast growing when these conditions are met.
2. Water Consistently and Deeply
Clematis vines need steady moisture, and they’ll slow to a crawl if the soil dries out.
Water deeply two to three times a week during the growing season, rather than giving light daily sprinkles.
When the roots have consistent water at depth, you’ll notice that clematis is fast growing in terms of new shoots and bud development.
3. Train the Vines Horizontally
Here’s a neat trick: instead of letting clematis grow straight up, train the stems at a slight angle or horizontal direction.
Horizontal growth encourages side shoots to break out along the entire stem, making the vine bush out and appear to grow faster overall.
4. Use a Slow-Release Fertilizer
A slow-release fertilizer in spring will feed your clematis steadily for months.
This is the easiest way to ensure clematis is fast growing even if you forget to feed it again later in the season.
Sprinkle a handful around the base, work it lightly into the soil, and let rain carry the nutrients down.
Common Mistakes That Slow Down Clematis Growth
Even though clematis is fast growing, certain pitfalls will stop it in its tracks.
Avoid these errors so your vine doesn’t get stuck in a slow-growth rut.
1. Planting in the Wrong Spot
If you plant clematis in deep shade or in soggy, waterlogged soil, the vine will struggle and barely grow.
Remember that clematis needs at least six hours of sun on its top growth, while the base stays shaded.
2. Skipping the Initial Watering Schedule
The first year is critical for root establishment, and you must water faithfully.
Even though clematis is fast growing in mature plants, a new transplant needs extra care before it can take off.
Underwatering in year one is the number one reason clematis appears slow.
3. Pruning at the Wrong Time
If you prune your clematis at the wrong season, you can accidentally cut off all the flowering wood and reduce vigor.
Know your clematis group (1, 2, or 3) and prune accordingly.
When you prune right, clematis is fast growing and blooms heavily, but wrong pruning ruins the show.
So, Is Clematis Fast Growing Enough For You?
Yes, clematis is fast growing, especially when you pick a vigorous variety and provide simple care.
You can expect most garden-center clematis to grow anywhere from 6 to 20 feet in a single season depending on the type.
If you want quick coverage for a fence, a way to frame a doorway, or a stunning vertical burst of color, this vine won’t disappoint.
Clematis is fast growing when it’s happy, and making it happy is as easy as deep planting, cool roots, steady water, and occasional feeding.
Now you can choose the right variety, plant it with confidence, and watch your clematis race up its support in record time.