Why Won't My Clematis Climb?
If your clematis is growing but refusing to climb, the problem may not be the plant.
It may be the support you're asking it to climb.
Looking for a clematis-friendly support? Skip to recommendations.
Many gardeners are surprised to learn that clematis do not climb the same way as ivy, climbing hydrangea, or Virginia creeper. Clematis do not cling with adhesive roots, and they do not climb with tendrils like peas or passion vine.
Instead, clematis climb by wrapping their leaf stems, called petioles, around nearby supports.
That means the size and shape of the support matters.
A beautiful clematis can struggle on thick posts, wide boards, fences, or decorative trellises simply because its leaf stems cannot easily grip the surface.
The Hagley Hybrid clematis shown here demonstrates how a narrow climbing support can transform an ordinary deck post into a flowering garden feature. Many gardeners assume the flowers are the hard part. Often, choosing the right support is the bigger challenge.
When clematis reaches full bloom, the flowers become the focal point while the support fades into the background.
How Clematis Actually Climbs
Take a close look at a clematis vine and you will notice that the leaves are doing much of the climbing.
As new growth develops, the leaf stems search for something narrow enough to wrap around. Once attached, those small stems help anchor the vine as it grows upward.
That is why clematis can climb fishing line, wire, mesh, netting, or twine, but often struggles on thick wood, vinyl, or decorative trellises with wide openings.
This clematis leaf stem has wrapped itself around the mesh. This is how clematis anchors itself as it climbs.
Watch a Clematis Find Its Support
Many gardeners are surprised to learn that clematis does not climb with tendrils or adhesive roots. Instead, its leaf stems search for narrow supports they can wrap around. Watch what happens when a clematis petiole encounters a section of mesh.
Time-lapse showing a clematis leaf petiole finding and wrapping around a narrow mesh support.
The Plant Isn't the Problem. The Support Is.
Many gardeners unknowingly reveal the solution themselves.
When a clematis struggles to climb a thick post, fence, or decorative support, gardeners often add twine, fishing line, wire, or netting. The vine quickly grabs the added material because it is narrow enough for the leaf stems to wrap around.
Notice how the clematis is climbing the added twine or wire rather than the post itself. The plant isn't the problem. The support is.
What Makes a Good Clematis Trellis?
A good clematis support provides plenty of narrow places for leaf stems to wrap around naturally.
- Narrow openings or wires
- Good airflow around the plant
- Strong mounting points
- Room for future growth
- Materials that will not rot or rust
Young clematis especially benefit from supports that offer many attachment points close together. The easier it is for new shoots to grab hold, the faster the plant becomes established.
From Deck Post to Flowering Feature
A deck post is too thick for clematis to climb on its own. By adding a narrow climbing surface, gardeners can transform a plain structural post into a vertical display of flowers.
The same deck post before planting and after a clematis became established.
Unexpected Places Clematis Can Grow
Many gardeners think clematis requires a large arbor or decorative trellis. In reality, clematis simply needs narrow supports that its leaf stems can grasp.
Posts, fences, walls, gates, and even downspouts can become successful growing locations.
Madame Julia Correvon clematis climbing a narrow mesh trellis mounted beside a residential downspout.
Ready to Give Your Clematis Something It Can Climb?
Whether growing on a deck post, fence, wall, gate, or downspout, clematis performs best when it has narrow supports that its leaf stems can naturally grasp.
Scroll Trellis provides hundreds of narrow attachment points that help clematis climb naturally while allowing the flowers to remain the focal point.
The right support can make the difference between a vine that struggles to climb and one that transforms an ordinary space into a flowering garden feature.
Explore our most popular trellises below.