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Sedum Cassette Trays

Pre-grown sedum cassette trays for instant green roofs. Modular, lightweight, and low maintenance for residential, commercial, and public buildings.

Sedum Cassette Trays, also known as Sedum Green Roof Trays, provide a complete, modular green roof system for creating instant extensive green roofs with no growing-in period. Each tray combines drainage, filtration, lightweight substrate, and pre-grown sedum vegetation into a single, ready-to-install cassette, making them one of the fastest and most reliable green roof solutions available.

Pre-grown with a diverse mix of at least eight drought-tolerant sedum species, these trays deliver immediate coverage, visual impact, and long-term resilience. The sedum plants are low-growing, hardy, and well suited to the exposed, low-nutrient conditions typical of rooftops.

Designed for quick installation, trays simply interlock and can be laid directly onto a prepared roof surface without specialist tools. This makes them ideal for new builds and retrofit projects, from small residential roofs and garden buildings to large commercial, industrial, and public sector developments.

Sedum Cassette Trays are widely specified by green roof contractors, landscapers, architects, developers, and local authorities, supporting Biodiversity Net Gain (BNG), SuDS, and urban greening objectives while delivering a clean, professional finish.

  • Ensure roof structure is suitable for saturated load before installation
  • Install onto a flat or gently sloping roof with appropriate waterproofing
  • Lay trays tightly together to prevent gaps and edge drying
  • Water thoroughly after installation to aid root establishment
  • Irrigate during prolonged dry periods, particularly in the first year
  • Remove wind-blown debris and occasional weeds
  • Limit foot traffic to maintenance access only

Colours

 

Tray Dimensions 495mm (L) × 460mm (W) × 80mm (H)
Coverage per Tray Approx. 0.23m²
Vegetation Minimum of 8 drought-tolerant sedum species
Layers Included Integrated drainage layer, Filter layer, Lightweight substrate, Mature sedum vegetation
Installation Modular system – trays click together with no tools
Maintenance Very low once established

Core species, colours and flowering period

Location overview Suitable for flat and gently sloping roofs on residential, commercial, industrial, and public buildings.
Light Requirements Performs best in full sun but tolerates light partial shade.
Substrate & Drainage Built-in lightweight substrate with integrated drainage layer ensures healthy root development.
Soil fertility Low nutrient requirements; fertilisation rarely needed.
Moisture Highly drought tolerant once established; occasional irrigation recommended during extended dry periods.

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