Bespoke Planter Liners, Troughs & Inserts
Custom Composite Inserts for Joinery, Furniture & Landscape Projects
At Sui Generis, we specialise in the design and manufacture of bespoke composite planter liners — also known as planter inserts or trough liners — engineered to deliver a watertight, long-lasting interior for custom planters, cabinets and landscaping units.
Our planter liners are moulded from ultra-tough, fibre-reinforced composite and made to fit your exact size, shape, and specification. Whether you’re working with timber, stone, metal or bespoke joinery, our inserts offer a reliable, leak-proof solution that protects your structures and supports healthy plant growth.
Fully Custom-Made for Your Project
Every insert we produce is custom built. Whether you’re a furniture maker, joinery specialist, landscape architect or contractor, we work closely with you to manufacture the perfect liner for your planter or container.
- Any size, shape or configuration
- Custom depths and drainage options available
- Lightweight yet incredibly strong
- Available in a range of colours and finishes
- Designed for quick and easy installation
Our in-house team can manufacture single units or full batch production runs, depending on your requirements.
Why Use a Composite Planter Insert?
A composite planter liner is essential when your outer planter is made from materials that can’t retain water — such as timber, MDF, sheet metal or decorative joinery. These liners act as a protective, watertight barrier, safeguarding both the structure and the surrounding space from leaks, rot, corrosion or swelling.
Common applications include:
- Joinery-built indoor and outdoor planters
- Timber seating with integrated planting
- High-end cabinet furniture for offices or hotels
- Large raised bed units and garden displays
- Commercial installations in public or urban spaces
A Smarter Alternative to Plastic Inserts
If you’re looking for plastic inserts for planters, consider the advanced alternative—a composite planter liner from Sui Generis. While plastic inserts may seem like a quick fix, composite materials offer superior performance, longevity, and design flexibility that simply outclass standard plastic options. Unlike plastic, composites won’t crack, warp or leak—making them ideal for high-end, custom builds.
- Made to Measure – Precision-crafted for a perfect fit
- Watertight & Durable – No leaks, no compromise
- Built to Last – Resistant to impact, UV, and weather
- Eco-Conscious – Sustainable, low-maintenance design
Trusted by Furniture Makers & Joinery Specialists
We work with a wide range of professionals across the joinery, bespoke furniture, landscaping, and construction sectors, offering tailored support from concept through to manufacture. Whether you’re lining one statement planter or developing an entire modular furniture range, we can help bring your designs to life — with precision-moulded, watertight inserts that meet your needs.
Let’s Talk About Your Requirements
We can manufacture planter liners to almost any size, shape or layout. Simply provide your drawings or dimensions, and we’ll design a solution that integrates seamlessly into your furniture, planter or feature. Need technical advice? Our team are on hand to assist with material suitability, installation tips, drainage and irrigation considerations. Contact us directly to find out how we can support your project.
Sustainable Manufacturing for the Future
All our planter inserts are made from a specialist composite resin that incorporates recycled plastic bottles, helping to reduce waste and support a circular economy. It’s just one of the ways we’re contributing to a more sustainable future — without compromising on strength or performance.
Choose the Right Planter Liner for Your Unique Project
Our bespoke FRP planter liners and inserts provide robust, watertight, and long-lasting solutions for a wide range of commercial and residential applications. Perfect for joinery, landscaping, and furniture design, our liners are crafted to meet your exact specifications while enhancing the longevity and performance of your planters.
- Watertight & Corrosion-Resistant – Ensures moisture containment and protection from rot, leaks, and structural damage.
- Lightweight Yet Strong – Easy to handle and install, while delivering superior structural integrity.
- Fully Customisable – Designed to your exact shape, size, and drainage needs for a seamless fit.
- Durable & Low Maintenance – Long-lasting performance without the need for frequent replacements or upkeep.
- Sustainable UK Manufacturing – Produced with recyclable materials and energy-efficient processes, reducing environmental impact.
Got Questions about Bespoke Planter Inserts?
Whether you’re specifying a one-off planter liner or planning a full project rollout, it’s important to get the details right.
Here are some of the most frequently asked questions about our bespoke composite inserts — covering everything from sizing and materials to applications and installation.
If you can’t find what you’re looking for, our team is always happy to help.
