Sky Garden Partners with Carbon Gold to Launch Premium Biochar Substrate Range for Urban Greening

At Sky Garden, we’re proud to announce a powerful partnership that will reshape the future of sustainable landscaping—our long-standing collaboration with Carbon Gold is entering a new phase as we integrate their award-winning biochar products into our brand-new range of premium substrates.

This innovative product line forms part of the official launch of Sky Garden’s new Soils Division, which is focused on delivering high-performance, sustainable growing media tailored for green roofs, podium landscapes, tree pits, and SuDS applications.

Why Biochar? Why Now?

Biochar is a high-carbon, porous material made from organic matter through a process called pyrolysis. It acts like a sponge in the soil—improving water retention, nutrient availability, microbial life, and long-term soil stability. When blended into substrate mixes, it offers enhanced resilience for plants in tough urban environments while also helping to sequester carbon, making it a vital tool in the fight against climate change.

Carbon Gold is the UK’s market leader in biochar technology, and we’re thrilled to incorporate their products into our substrates. These new biochar blends are ideally suited for:

• Green roofs – improving plant health and moisture retention in exposed, shallow-root systems
• Intensive podium landscapes – supporting deeper planting beds, trees, and shrubs in constrained urban areas
• Urban tree pits – providing long-term soil structure, improved root aeration, and reduced compaction
• Rain gardens & SuDS – enhancing infiltration and filtration in high-performance drainage systems

A Proven Partnership

Sky Garden and Carbon Gold have collaborated for years on projects across the UK, testing and validating the benefits of biochar in real-world applications. This new product range is a culmination of that partnership—pairing Sky Garden’s expertise in green infrastructure with Carbon Gold’s soil science innovation.

As the Soils Division grows, we’ll be releasing further information on our specialist mixes, including tree soils, lightweight intensive soils, SuDS substrates, and our new planter mix.

Stay tuned for the full product launch and technical specifications. For architects, contractors, and specifiers looking for performance, sustainability, and proven environmental benefit—Sky Garden’s biochar-enhanced substrates are the new standard.

Want to learn more or request a sample? Contact the Sky Garden team today and be part of the next generation of sustainable urban greening.