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We are excited to announce the launch of a new, modular, bioretention rain garden system. The HydroPlanter is a stormwater management solution that can be retrofitted into highway schemes and on new developments of any size.

This is a ‘plug and play’ sustainable urban drainage solution (SUDs) that can attenuate and cleanse stormwater and provide amenities and biodiversity to new and existing spaces. The modules will be filled with a particular soil specification and planted wildflowers and biodiverse grasses.

The concept is flexible, scalable and each unit stacks together to be a convenient solution that any subcontractor can work with and install. Installation is fast, simple and offers significant savings to alternative methods.

The modular characteristics with pre-calculated hydrological performance statistics mean that the specification and design is very simple for any given catchment area.


  • Stormwater attenuation storage
  • Excellent amenity and biodiversity values
  • Installation speed and simplicity
  • Ease of specification and design
  • Cost-effectivenessss
  • Freeze/thaw-resistant system


  • 100% recycled materials
  • Slot-together modules
  • Optional exceedance flow drain point
  • Stack-able design for transport efficiency


Product CodeDescriptionInternal Volume
GBUHPSM1AHydroPlanter Starter Module0.8 cubic meter
GBUHPCM1AHydroPlanter Continuation Module0.8 cubic meter
GBUHPEM1AHydroPlanter End Module1.12 cubic meters
GBUHPIM1AHydroPlanter Indivdual Module1.12 cubic meters
GBUHPWWAHydroPlanter Weir Wall 100x65x1200mm
GBU10PSAHydroPlanter Drainage 10mm Pea Shingle


Catchment areaCatchment area per module for each UK region has been calculated and is viewable on the downloadable datasheet.
InfiltrationThe HydroPlanter works as a fully lined system not allowing infiltration, so no further lining of the excavation is necessary. If infiltration is required, GBU can provide adapted HydroPlanters to suit.
UtilitiesUtilities can be simply worked around – review details on the downloadable datasheet.
Stock holdingLarge stocks are held in the UK for immediate despatch.
Pollution removal indices (CIRIA SuDS Manual – Bioretention System)            TSS: 0.8 – Metals: 0.8 – Hydrocarbons: 0.8


Invert level760mm from top of Module (excluding weir walls)
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Greenleaf Ireland is a trading entity of Ebrington (NI) Ltd. Registered in Northern Ireland. Company registration number: NI604898.
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