GREEN WALL SUBSATRATE MIX IN BULK BAGS
The Green Wall Substrate Mix is a lightweight, high-performance growing medium specifically engineered for vertical planting systems. Designed to meet the unique challenges of green wall environments. Provides optimal drainage, aeration, and moisture retention. This mix supports healthy root development and long-term plant vitality in green wall installations. Technical datasheet
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(Excl. VAT £24)
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Blending fine mineral aggregates with organic components, the mix ensures sustained plant health by facilitating nutrient uptake, resisting compaction, and maintaining consistent moisture distribution through capillary action. It is suitable for modular or continuous green wall systems in both interior and exterior applications.
With its carefully balanced physical and chemical properties, this substrate supports vigorous plant growth while minimising weight load on structural elements.
- Ideal for vertical systems where weight and media stability are critical.
- Retains moisture efficiently while promoting even distribution across the vertical profile.
- Provides a supportive structure that allows plants to establish secure root systems in shallow planting zones.
- Prevents waterlogging and ensures oxygen availability for healthy root development.
- Formulated to maintain its integrity over time, reducing the need for frequent media replacement.
This substrate blend is currently undergoing independent laboratory analysis by STRI (Sports Turf Research Institute) to validate physical, chemical, and biological performance. Full test reports will be made available upon completion and can be provided to clients on request.
Moisture retentiveGrowing Medium
LightweightUK Green Roof Code of Best Practise
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Physical Properties Bulk Density When Oven Dried 0.85 – 0.95 g/cm³ Physical Properties Bulk Density at field capacity 1.00 – 1.10 g/cm³ Physical Properties Field capacity (% v/v) 35 – 40% Physical Properties Total porosity (%) 50 – 60% Physical Properties Porosity at field capacity (%) 15 – 20% Technical Properties Organic matter (% weight) 8 – 10% Technical Properties Electrical Conductivity (mS cm-1) 6.2 – 7.2 Technical Properties pH 0.6 – 1.0 mS/cm Technical Properties Phosphate (mgl-1) 10 – 20 Technical Properties Potassium (mg l-1) 150 – 250 mg/L Technical Properties Total nitrogen (%) 0.6 – 1.0%