In January 2026, we met with leading topsoil consultant Tim O’Hare to explore the development of a new range of engineered soil products which better meet the needs of landscaping projects – now and in the future. Demand for these specialist soils is being driven mainly by landscape architects and Tier 1 contractors who are keen to meet the changing requirements of urban infrastructure projects. Driven by shifting climate patterns (particularly wetter winters and drier summers) and more stringent sustainability standards, there’s a growing need for soils which can deliver consistently in urban environments.
Our discussions focused primarily around bioretention soils, SuDS soils and tree pit soils. So what are these engineered soils and why do they matter to today’s landscaping projects?
What is Bioretention Soil?
Bioretention soil is a high-performance growing medium used in sustainable drainage systems (SuDS), rain gardens and bioretention basins. It helps manage stormwater runoff by filtering water, removing pollutants such as heavy metals and hydrocarbons and controlling excess surface water.
Bioretention soils are typically made from a sandy loam blend, using around 85–88% sand. This ensures high permeability and rapid drainage while still providing good support for healthy plant growth.
What is SuDS Soil?
SuDS (Sustainable Drainage Systems) soil is a free-draining blend designed to manage surface water runoff in urban environments. It enables rapid infiltration, filtration and temporary storage of water, helping to reduce flood risk and pressure on traditional drainage infrastructure.
SuDS soils are commonly used in rain gardens and bioretention systems. This type of soil also helps promote biodiversity and supports plants to establish themselves well.

What is Tree Pit Soil?
Tree pit soil is an uncompacted, nutrient-rich growing medium designed to support tree root development in challenging urban environments. It’s typically used where space is restricted or where trees are planted in hard-landscaped or high-traffic areas.
This type of soil blend is specially formulated to provide water retention, drainage and aeration, helping to prevent compaction, nutrient deficiency and poor root growth underneath paved or sealed surfaces.
Our next steps
These interesting discussions with Tim focused on the relevant specifications, performance requirements and the types of raw materials which are expected in these engineered soil blends. With a clear need in the sector, we’ll be working closely with Tim to help develop this range of new engineered soils, so that we can bring these products to market with confidence.




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