Terraffix biochar additive – land remediation

HydraCX with Terraffix sprayed onto subsoilRapidly established growth using HydraCX just below the railway lineFibres up closeHydraCX with Terraffix applied to Type 1 fill material on A11 SuDs projectA11 drainage channels vegetatingClose up of 6F2 fill material on M25Hydraulic seed rig spraying HydraCX with Terraffix onto a 45° slopeVegetation September 2010
HydraCX with Terraffix applied to Type 1 fill material on A11 SuDs project

TerrAffix™ biochar is a natural product which is used to stabilise and restore degraded soils. Salix use TerrAffix when applying HydraCX as it provides plants with essential nutrients whilst actively reducing pollutants in the soil and locking in carbon.


TerrAffix is made in Wales, from sustainably managed woodlands combined with organic certified materials, unlike many biochars which are made using African or South American woods and not always from sustainable sources.

Used in conjunction with our HydraCX system it ensures an extremely rapid establishment of plants, even on the most depleted of soils. It also assists in getting the soil ecosystem functioning.

TerrAffix can be used on land remediation projects where heavy metals and other contaminants are present. A cost-effective approach to regenerating brown field sites.

  • Suitable for use on acidified soils
  • Reduces mobilisation and bioaccumulation of heavy metals within the vegetation
  • Boosts soils with nutrients, minerals and trace elements
  • Provides short and long-term nutrient availability
  • Improves drainage and aeration
  • Provides opportunities for thriving microbial populations
  • Carbon-lock provides for quantified sequestered carbon
  • Accredited product
  • Manufactured from environmentally appropriate, sustainable materials
  • Boosts depleted soils with nutrients, minerals and trace elements
  • Improves conditions for earthworm activity
  • Promotes structure, creating spaces within the soil
  • Improves drainage and soil oxygenation
  • Improves the resilience of plants to pests and diseases
  • Provides opportunities for thriving microbial populations
  • Environmentally sustainable

We use this in conjunction with TerraRhizae, a combination of 9 different types of endomycorrhizal fungi, critical to the establishment of vegetation on substrates low in available mineral nutrients such as engineered sub-base and sub-soils .

By using this product you are investing in the soil ecosystem, which means much better and functioning soil over the long-term. Better functioning soils improve the local habitats and environment.

Product Downloads

Terraffix general brochure
Terraffix-G brochure
Terraffix-C brochure


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