How Close Can You Plant Clematis To Each Other

You can plant clematis as close as 2 to 3 feet apart, but the exact distance depends on the variety and how you want them to grow.
 
If you’ve been wondering how close you can plant clematis to each other, the short answer is that most cultivars thrive with 3 feet of breathing room between them.
 
However, some vigorous types need more space, while compact varieties can be planted closer together, sometimes even 18 inches apart.
 
In this post, we’ll dig into how close you can plant clematis to each other, the factors that change that spacing, and the mistakes to avoid when planting them side by side.
 
Let’s get those vines growing happily together.
 

Why Spacing Matters When You Plant Clematis Close Together

While you can plant clematis close to each other, giving them enough room is all about their roots and their tops.
 
Clematis are greedy at the root level, and they also spread their stems and leaves outward as they climb.
 
If you plant clematis too close without considering their growth habits, you might end up with weak plants that compete for water, nutrients, and sunlight.
 
Let’s break down the main reasons why getting the spacing right matters so much.
 

1. Root Competition Is the Biggest Concern

When you plant clematis close to each other, their root systems will inevitably overlap in the soil.
 
Clematis roots are extensive and like to stay cool and moist, but they also spread out horizontally quite a bit.
 
If they’re too close, the roots of one plant will steal moisture and food from the other.
 
This is why spacing of at least 2 to 3 feet is usually recommended for most large-flowered hybrids.
 
Giving each clematis its own root zone helps them both grow strong instead of fighting each other.
 

2. Airflow Prevents Fungal Diseases

Another reason to think about how close you can plant clematis to each other is airflow.
 
Clematis vines love sunshine on their leaves, but they also need good air circulation to stay dry.
 
When you plant clematis too close, the foliage becomes dense and trapped, which creates the perfect environment for powdery mildew and other fungal issues.
 
Leaving some space between plants allows breezes to move through, keeping the leaves drier and healthier.
 
So even though you can squeeze them together, a little extra room goes a long way for disease prevention.
 

3. Avoiding Tangled Stems and Messy Growth

If you plant clematis close together, their stems will interweave and climb over each other.
 
A little tangling is actually fine, and some gardeners love the look of two colors mixing together.
 
But if the plants are too close, it becomes almost impossible to prune them properly or tell which stems belong to which plant.
 
This can lead to accidental over-pruning of one plant while neglecting the other.
 
For easier maintenance, stick to at least 2 feet of distance if you’re growing them on the same trellis or structure.
 

How Close Can You Plant Clematis Based on Variety?

The question of how close you can plant clematis to each other isn’t a one-size-fits-all answer.
 
Different types of clematis have very different growth rates and final sizes.
 
Let’s look at the main categories so you can decide the best spacing for your garden.
 

1. Large-Flowered Hybrids: 3 Feet Apart

These are the classic showy clematis with big blooms, like ‘Jackmanii’ or ‘Nelly Moser’.
 
They typically grow 6 to 10 feet tall and spread about 3 feet wide.
 
For these beauties, you should plant clematis at least 3 feet apart.
 
This gives each plant enough root space and keeps their heavy vines from suffocating each other.
 
If you plant clematis from this group closer than 3 feet, you’ll likely see stunted growth and fewer flowers.
 

2. Vigorous Species and Viticella Types: 4 to 5 Feet Apart

Some clematis are real thugs, they just take over everything in their path.
 
Species like Clematis montana or the tough viticella group can easily reach 15 to 20 feet in a single season.
 
For these vigorous climbers, you should think bigger when asking how close you can plant clematis to each other.
 
Give them at least 4 to 5 feet of space, or even more if you have the room.
 
They’ll grow so fast that any less space means they’ll completely swallow each other.
 

3. Compact and Container Varieties: 18 to 24 Inches Apart

Some clematis are bred to stay small, perfect for patio pots or small garden beds.
 
These dwarf types, like ‘Blekitny Aniol’ or certain alpine clematis, only grow 3 to 4 feet tall.
 
You can plant clematis from this group much closer, around 18 to 24 inches apart.
 
Their small root systems won’t fight as much, and their shorter vines are easier to keep untangled.
 
Just remember that even compact types appreciate a little air between their leaves.
 

Tips for Planting Clematis Close Together Successfully

If you’re determined to plant clematis closer than the recommended distance, you can still make it work with a few smart tricks.
 
Here’s how to give your vines the best chance when space is tight.
 

1. Dig Wide, Not Just Deep

When you plant clematis close to each other, focus on preparing the soil generously for every single plant.
 
Instead of digging only a narrow hole, dig a wide planting area that’s at least 18 inches across for each vine.
 
Mix in plenty of compost and organic matter to help the roots spread easily without hitting poor soil.
 
This also helps hold moisture around the roots, which clematis absolutely love.
 

2. Water Deeply and Consistently

Competition for water is the number one problem when you plant clematis close to each other.
 
To minimize that stress, water each plant deeply at its base rather than just sprinkling the whole area.
 
A soaker hose running along the base of the plants works perfectly.
 
Mulch heavily with bark or straw to keep the roots cool and to slow down evaporation.
 
Consistent moisture encourages robust root growth, which helps both plants thrive side by side.

3. Fertilize a Little More Often

Because closely spaced clematis share the same soil, they’ll deplete nutrients faster.
 
Apply a balanced fertilizer in early spring and again after the first flush of blooms.
 
A slow-release fertilizer is also great as it feeds the plants continuously over months.
 
Just avoid getting fertilizer directly on the stems or leaves to prevent burning.
 
With a little extra feeding, you can plant clematis closer without sacrificing bloom quality.
 

4. Train Them in Opposite Directions

If you’re growing multiple clematis on the same trellis, help them avoid tangling.
 
As the shoots emerge, gently tie them so one plant goes right and the other goes left.
 
This simple trick keeps the stems from getting hopelessly twisted together.
 
It also ensures that both plants get even sunlight exposure across their leaves.
 
You’ll still get a beautifully blended display, just without the messy chaos.
 

Can You Plant Clematis Close Together in Containers?

Growing multiple clematis in one pot is a different ball game than planting in the ground.
 
Yes, you can plant clematis close together in a large container, but you need a big pot.
 
Use a container that’s at least 20 to 24 inches wide and deep for two plants.
 
The roots will be confined, so you’ll need to water more often and fertilize regularly.
 
As a general rule, when you plant clematis close together in pots, stick to compact varieties.
 
Large-flowered types will quickly outgrow the root space and show their frustration by yellowing leaves.
 

So, How Close Can You Plant Clematis to Each Other?

You can plant clematis close to each other, but aiming for 2 to 3 feet apart is the sweet spot for most garden varieties.
 
Remember that vigorous types need much more space, while compact ones are happy with just 18 inches.
 
When you plant clematis close together, always prioritize root space, airflow, and consistent care.
 
With proper spacing and a little extra attention, you can absolutely enjoy a stunning wall of mixed clematis blooms.
 
So measure your planting area, pick your varieties, and get those beautiful vines in the ground.