Downspout Trellis for Clematis and Climbing Plants, 9 ft Tall x 4 in Wide

Why it works

Designed around how climbing vines actually climb
½-inch mesh gives clematis petioles, tendrils, and twining stems narrow grip points.

Slim 4-inch profile
Fits close to the downspout without the bulk of a traditional trellis.

One continuous 9-foot climbing surface
Gives vines plenty of vertical growing room.

Installs in about 20 minutes
No digging or ground stakes required.

Maintains airflow behind the vine
Offset brackets create about 2 inches of space behind the mesh.

Description

Hide an ordinary downspout behind a spectacular flowering vine. Scroll Trellis transforms an overlooked downspout into a vertical growing space with a slim, continuous 9-foot climbing surface. Designed specifically for standard residential downspouts, the offset mounting system positions the mesh in front of the downspout, leaving space behind the vine for airflow.

The UV-resistant black mesh can be trimmed with ordinary scissors if a shorter height is needed. Each kit includes everything needed to mount one trellis to a standard residential downspout.

What’s included

• 1 roll of 9-foot UV-resistant black HDPE mesh (ships rolled and unrolls flat)
• 3 black composite mounting brackets
• 6 button head fasteners
• 3 zinc-coated self-drilling screws for standard residential 2x3 and 3x4 metal downspouts
• 3 stainless steel cable ties to secure the trellis
• Illustrated installation guide with tips for clematis and other climbing vines

Installation & Mounting

• Most gardeners complete installation in about 20 minutes using a drill/driver and household scissors.

  Step 1: Measure downspout

  Measure the front of your downspout where you plan to install the trellis. The Downspout Trellis is designed for standard 2×3-inch and 3×4-inch rectangular downspouts.

  Step 2: Prep the kit
  Untie the mesh and remove the loose black composite block, the small bag of button head fasteners, and the three stainless steel zip ties. Set aside.

  Step 3: Mount the top bracket
  Attach the top black composite block to the front of the downspout just below the gutter seam. Position it so the two button head fasteners press against the downspout.
  The included screw is self-drilling, so no pilot hole is needed.

  Step 4: Attach and tension the mesh
  Unroll the mesh. On the second black composite block, remove the long screw and button head fasteners.
  Insert the button head fasteners through the mesh and back into the black composit block at your desired height.
  Start the long screw lightly, pull the mesh straight, then tighten the black composite block against the downspout and fully drive the screw.

  Trim any excess mesh at the bottom with scissors.

  Step 5: Add mid support
  Attach the third black composite block to the mesh with button head fasteners, then secure it to the downspout with the screw.

  Step 6: Secure with zip ties
  Lace one stainless steel zip tie through the mesh across the front of each block, wrap around the downspout, and tighten to lock everything in place.

Will it Fit My Downspout?

The Scroll Trellis Downspout Trellis is designed for standard 2×3-inch and 3×4-inch rectangular residential downspouts.

The black composite mounting brackets hold the mesh approximately 2 inches away from the downspout, providing space for climbing vines and airflow.

The trellis measures 9 feet tall × 4 inches wide and can be trimmed shorter with household scissors if needed.

Not sure whether it will fit? Measure your downspout before ordering. If you have an unusual size or shape, contact us and we'll be happy to help.

Which Climbing Plants Work Best?

The Scroll Trellis Downspout Trellis supports several types of climbing vines, including:

• Clematis - Uses slender leaf stems (petioles) to wrap around the mesh.

• Morning Glory - Twining stems wind around the mesh as the plant grows.

• Mandevilla - Twining stems climb with a little initial guidance.

• Sweet Peas - Delicate tendrils grasp the narrow mesh.

• Canary Creeper - Uses leaf stalks to climb.

• Passion Flower - Tendrils curl around the mesh for support.

Why it works: The ½-inch × ½-inch mesh openings provide slender places for petioles, tendrils, and twining stems to grip.

For best results, choose a variety suited to your growing zone, sunlight conditions, and available space. Compact to moderately vigorous vines are generally better choices for a residential downspout than very large, aggressive climbers.

Growing on a Post, Wall, or Other Flat Surface?

The Downspout Trellis is designed specifically for standard residential rain gutter downspouts.

Growing clematis or other climbing vines on a deck post, porch column, mailbox post, fence, pergola, or wall instead?

Our Scroll Trellis Narrow Trellis uses the same flexible, plant-friendly mesh but is designed to mount to flat surfaces.

Downspout Trellis or Narrow Trellis - Which Do I Need?

 Visit our Choose the Right Trellis for Your Space guide to see which design works best for your growing location.

Why Won't My Clematis Climb?

Clematis climbs by wrapping its slender leaf stems, called petioles, around narrow supports. Thick posts and smooth surfaces can be difficult for them to grasp.

Scroll Trellis provides ½-inch mesh openings that give clematis plenty of places to attach naturally.

→ Learn Why Your Clematis Won't Climb

FAQs

Does the trellis mount to the downspout or the wall?

The Downspout Trellis mounts directly to the downspout using three black composite brackets and zinc-plated self-drilling screws. Stainless-steel cable ties help secure the mesh. The brackets hold the mesh about 2 inches away from the downspout, leaving space for the vines and airflow.

Will it fit my downspout?

The Downspout Trellis is designed for standard 2×3-inch and 3×4-inch rectangular downspouts. Not sure about yours? Contact us with your downspout measurements before ordering.

Will installation put holes in my downspout?

Yes. Installation requires a drill/driver and the included self-drilling screws, which create small mounting holes in the downspout. Follow the included instructions for proper installation. 

Will the trellis block water flow?

The trellis mounts on the outside of the downspout, leaving the exterior climbing surface separate from the drainage channel. Proper installation is important because the mounting screws penetrate the downspout.

Is the trellis one piece or modular?

The Downspout Trellis provides one continuous 9-foot-tall, 4-inch-wide climbing surface made from flexible, UV-resistant HDPE mesh. You can trim the mesh shorter with ordinary scissors if needed.

Is a 4-inch-wide trellis enough for climbing plants?

Yes. The mesh is only 4 inches wide, but your vine isn't limited to growing within those 4 inches. The trellis supports the climbing stems while leaves, flowers, and branches grow outward beyond the mesh.

Watch our 4-inch trellis video "4 Inches Wide - Room for the Vine to Grow" in the Downspout Trellis FAQ  

What plants work best with the Downspout Trellis?

Clematis, morning glory, mandevilla, sweet pea, canary creeper, and appropriately sized passion flowers are good choices. The ½-inch mesh openings provide places for leaf petioles, tendrils, and twining stems to hold on.

Is the Downspout Trellis difficult to install?

Installation involves three main steps: attach the brackets, unroll the mesh, and secure it with the included cable ties. Installation generally takes about 20 minutes, depending on the mounting conditions and your experience using a drill.

More Questions About the Downspout Trellis?

Want to see installation photos, a demonstration of how wide vines can grow, or what the trellis looks like before plants fill in?

Visit our Downspout Trellis FAQ for more answers, real garden photos, and short videos.