Hybrid SuDS Planters: Your top 3 questions answered
Sustainable drainage systems (SuDS) are now essential green infrastructure for UK towns and cities when it comes to managing surface water and reducing localised flood risk. But traditional rain gardens or SuDS planters aren't always practical, especially on sites packed with underground utilities or without nearby roof downpipes.
That's where our Hybrid SuDS Planter comes in. As one of the more adaptable sustainable drainage solutions available, it's prompting plenty of questions from local authorities, schools, and commercial developers
Here are the three we get asked most often:
1. How does a Hybrid SuDS Planter actually work?
Each Hybrid SuDS Planter is filled with an attenuating aquifer medium base, a lightweight water-retentive material that replaces the deep excavation typically needed for conventional SuDS.
Capture: Rainwater flows into the planter through inlets or from nearby paved surfaces.
Storage: The aquifer block layer at the base holds the rainwater for a short time, stopping it from running off too quickly.
Capillary Rise: The stored water slowly moves up through the soil, keeping the plants watered.
Gradual Release: Any extra water either evaporates or drains slowly back into the local system.
This combination of storage and slow release is what makes the system so effective at reducing localised flooding.
How the Hybrid SuDS Planter works
2. How is a Hybrid SuDS Planter different from a traditional rain garden?
The biggest barrier to installing a traditional rain garden in an urban environment is almost always what's underneath the ground such as utility pipes, cables, and ducting that make deep excavation risky, expensive, disruptive or simply impossible.
Traditional rain gardens rely on deep digging to create the storage void needed to hold surface water. On many urban sites, that depth just isn't available without disturbing utility infrastructure.
Hybrid planter install at Trinity Primary School
Traditional rain garden at Sutherland Road
The Hybrid SuDS Planter solves this by mimicking the water retention performance of a rain garden using a shallow, partially submerged aquifer block instead.
For example, at Redlees Park in the London Borough of Hounslow, Meristem’s Hybrid SuDS Planters were installed as a series of ground-level, partially submerged units, each sunk 200mm into the ground. The planters feature a Hydrorock base layer that provides subsurface water storage and attenuation. Outer edges of the planters were finished with 10 mm shingle, ensuring a seamless interface for surface water flow.
You get the same core benefits - capture, storage, and gradual release of rainwater - without the excavation risk, cost, or disruption.
3. Where can Hybrid SuDS Planters be installed?
The Hybrid SuDS Planter is a customisable sustainable drainage solution that is built for flexibility, making it suitable for most locations - particularly where there are a lot of underground utilities. Locations include
- Soft ground
- Paving
- Tarmac surfaces
- Public spaces and parks
- School playgrounds
If a site has shallow utilities, limited excavation depth, or constrained space, the Hybrid system is very likely to work where a traditional rain garden wouldn't. It's also fully customisable - sizes and finishes can be tailored to the site, and the system can incorporate trees, seating, or bespoke planters to create genuinely multifunctional public spaces.
Planting is typically a mix of drought-tolerant, low-maintenance species, chosen to support pollinators and biodiversity while keeping ongoing maintenance requirements low.
So, why choose a Hybrid SuDS Planter?
Space-saving
Shallow base design means minimal excavation and disruption to underground utilities.
Effective flood mitigation
Capillary action provides both storage and gradual release of surface water, easing pressure on local drainage systems.
Fully customisable
Adaptable to soft ground, paving, or tarmac, and can integrate seating, trees, or bespoke planters.
Biodiversity boost
Resilient, low-maintenance planting supports pollinators and improves air quality while enhancing the public realm.
Get in Touch
Whether you're working on a local authority greening scheme, a school playground redesign, or a commercial public realm project, our Hybrid SuDS Planters offer a practical route to sustainable drainage - even on the most constrained urban sites.
View our brochure or get in touch with our sales team to discuss how a Hybrid SuDS Planter could work for your next project.
