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What to grow at the base of clematis is a question every gardener faces when they notice those bare, woody stems.
The best things to grow at the base of clematis are shallow-rooted, moisture-loving plants that thrive in the cool shade their roots crave.
You see, clematis has a well-known preference for having its head in the sun and its feet in the shade.
So when you’re deciding what to grow at the base of clematis, you’re really looking for low-growing companions that won’t compete aggressively for water or nutrients.
In this post, we’ll explore the best options for what to plant at the base of clematis, why these companions work so well, and a few plants you should avoid at all costs.
Let’s dig into the perfect underplanting strategy for your climbing beauty.
Why You Should Choose Companions for the Base of Clematis
Choosing what to grow at the base of clematis is about more than just aesthetics.
Those bare stems can look a little lonely, but more importantly, the soil at the base needs protection from intense heat.
Clematis roots prefer to stay cool and consistently moist, and a living mulch of low plants is the perfect way to achieve that.
When you plant something at the base of clematis, you’re essentially creating a microclimate that mimics the plant’s natural woodland habitat.
This simple trick reduces the need for heavy mulching and keeps your clematis happy and thriving.
1. Cool Roots Mean More Flowers
The primary reason gardeners focus on what to grow at the base of clematis is to maintain a cool root zone.
When soil temperatures spike, clematis can stress, which often leads to fewer blooms and stunted growth.
A dense mat of foliage shades the soil, keeping the roots consistently cool even during summer heatwaves.
So by choosing the right plants, you’re not just hiding ugly stems; you’re actively encouraging a more vigorous and floriferous display.
2. Moisture Retention Is Key
Another reason you’re thinking about what to grow at the base of clematis is moisture retention.
Clematis hates drying out, but you also don’t want your companions stealing every drop of water.
The key is to select plants with fibrous, shallow root systems that act like a sponge, holding moisture in the soil without becoming thugs.
This living ground cover reduces evaporation and keeps the root zone evenly damp.
It’s a win-win situation where the companion plants and the clematis both flourish.
3. Provides a Natural Weed Barrier
When you establish the right plants at the base of clematis, you’re also crowding out weeds.
Weeds can be ruthless competitors, stealing nutrients and water from your clematis.
A thick, healthy planting of chosen companions will smother weed seeds before they even get a chance to sprout.
This cuts down on your weeding time and creates a neat, tidy look around the base of your vine.
It’s a practical and beautiful solution for a very common gardening problem.
The Best Plants to Grow at the Base of Clematis
Now that you understand the why, let’s get to the fun part: the specific plants.
There are many wonderful options for what to grow at the base of clematis, and they all share a few key traits.
Look for plants that are hardy, tolerant of part shade, and happy with consistent moisture.
Here are our top picks for what to plant at the base of clematis for a stunning and healthy garden.
1. Hardy Geraniums (Cranesbill)
Hardy geraniums are a classic choice for what to grow at the base of clematis.
They form a dense, billowing mound of foliage that perfectly shades the roots.
Their fibrous root systems are shallow, so they won’t disturb your clematis.
And to top it off, they produce a profusion of charming flowers in shades of blue, purple, and pink from late spring through summer.
They’re a low-maintenance, high-impact companion that looks lovely sprawling over the base of the vine.
2. Alchemilla Mollis (Lady’s Mantle)
Lady’s Mantle is another fantastic option when thinking about what to grow at the base of clematis.
It’s famous for its soft, scalloped leaves that catch rainwater in beautiful, jewel-like droplets.
This plant forms a soft, airy clump that doesn’t overwhelm the clematis stem.
In early summer, it produces frothy sprays of tiny yellow-green flowers that add a delicate texture.
It thrives in the same cool, moist conditions that clematis loves, making it a perfect match.
3. Nepeta (Catmint)
If you’re looking for what to grow at the base of clematis that attracts pollinators, catmint is a superb pick.
Its aromatic, gray-green foliage forms a neat, spreading mound.
From early summer to autumn, it’s covered in spikes of lavender-blue flowers that bees and butterflies absolutely adore.
Catmint is tough, drought-tolerant once established, and won’t compete heavily with your clematis.
Its longer bloom time provides wonderful color and movement right where you need it.
4. Heuchera (Coral Bells)
For a dash of dramatic foliage, consider Heuchera for what to plant at the base of clematis.
These plants come in an incredible range of colors, from deep purple and burgundy to lime green and peach.
The low, mounding habit of Heuchera is perfect for covering those bare clematis stems.
They don’t mind the shade that the clematis foliage casts later in the season.
Their evergreen leaves provide year-round interest, ensuring your base never looks bare even in winter.
5. Spring Bulbs
Don’t forget about early-season interest when deciding what to grow at the base of clematis.
Planting bulbs like crocus, dwarf tulips, or grape hyacinths in the fall gives you a beautiful spring show.
These bulbs wake up and bloom long before the clematis starts into full growth.
By the time the clematis is putting on heavy foliage, the bulbs are dying back and won’t compete.
It’s an easy way to extend the season of beauty at the base of your vine.
What to Avoid Planting at the Base of Clematis
Just as important as knowing what to grow at the base of clematis is knowing what to avoid.
Steer clear of aggressive spreaders like mint, which will quickly strangle your clematis roots.
Avoid deep-rooted, greedy feeders like large shrubs or heavy trees that will win the water battle.
Also, skip plants that require very dry, well-drained soil, as this will clash with the clematis’s need for moisture.
By sidestepping these problematic plants, you ensure your clematis stays the star of the show.
So, What to Grow at the Base of Clematis?
What to grow at the base of clematis comes down to choosing shallow-rooted, moisture-loving perennials that provide visual interest.
The best things to grow at the base of clematis are hardy geraniums, lady’s mantle, catmint, heuchera, and spring bulbs.
These companions will keep your clematis roots cool, retain soil moisture, and suppress weeds.
With the right plants at the base of clematis, you’ll create a lush, layered, and long-flowering display.
Happy planting.