Salix

What Salix does

Salix River & Wetland Services Limited is a UK-based specialist contractor and manufacturer providing nature-based solutions for river restoration, erosion control, and wetland creation. Founded around 2000 and headquartered in Barton-under-Needwood with manufacturing operations in Thetford (Croxton Nursery) and Laugharne, the company operates across three integrated revenue streams: design and build contracting (prime and subcontractor delivery for river restoration, wetland creation, and civil engineering); product manufacturing (coir fibre rolls and pallets, erosion control blankets, VMax³ turf reinforcement mats, AquaRockBags, HydraCX, and Terra-Lock anchoring systems); and plant nursery operations producing 3+ million native wetland, saltmarsh, moorland, and sand dune plants annually across 280+ species.

The company is Europe's largest producer of coir fibre rolls and the UK's largest grower of native wetland plants. Its proprietary wet-bed cultivation process produces pre-established coir systems grown for 1-2 years before installation, delivering up to 85% CO2 savings versus imported ready-made coir rolls. The technology stack combines coir fibre processing, hydraulic erosion control, geomat reinforcement systems, and ecological engineering expertise developed over 25+ years.

Salix serves enterprise B2B customers including water utilities (Anglian Water, MWH Treatment), government bodies (Environment Agency, Network Rail, Pembrokeshire Council), and major infrastructure contractors (Balfour Beatty, Skanska, BAM Nuttall). Pricing is quote-based and not publicly disclosed. The company holds ISO 9001/14001/45001, CHAS, EcoVadis, Constructionline Gold, and Achilles UVDB Silver Plus certifications, and operates as a subsidiary of RSK Group following its 2023 acquisition. Key partnerships include Project Seagrass (UK seagrass nursery development), Norfolk Rivers Trust (chalk river restoration), and founding membership of the European Soil and Water Engineering Group (ESWEG).

Name

Salix

Legal name

Salix River & Wetland Services Limited

Website

https://salixrw.com

Company type

Private

Founded year

2000

Operating status

Operating

Headcount range

11–50 employees

Short description

Salix River & Wetland Services is a UK specialist contractor and manufacturer providing nature-based solutions for river restoration, erosion control, and wetland creation, serving water utilities, government bodies, and infrastructure contractors across Britain.

Ownership category

akta.pro rank

Product category

Environmental Restoration Services

NAICS

Landscape Architectural Services (54132), Environmental Consulting Services (541620), Remediation Services (56291)

akta.pro primary industry

Erosion Control & Slope Stabilization (Softscape/Planting Solutions) (HSAIABAI)

akta.pro secondary industries

Erosion Control & Land Stabilization (BPABADAH), Urban Flood Resilience & Adaptation Planning (Climate, Nature-Based Solutions) (EUANAEAJ), Water Reclamation & Reuse Production (Tertiary/Advanced Treatment) (EUANADAD), Water Reuse & Reclamation Infrastructure Construction (Recycled Water Systems) (IMAFAGAH)

Keywords

• River restoration services
• Erosion control products
• Wetland construction
• Bioengineering solutions
• Nature-based solutions

Headquarters

HQ city

Thetford

HQ country

United Kingdom

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Design & Build Contracting: Integrated design and build services for river restoration, wetland creation, erosion control, and civil engineering projects. Operates as principal contractor and specialist subcontractor deploying own machinery and installation teams.
2. Product Sales: Manufacturing and supply of erosion control products including coir rolls, pallets, rock products, erosion control blankets, wetland plants, and silt control products. Products sold directly to contractors, councils, and utilities.
3. Plant Nursery Sales: Production and sale of native wetland plants, wildflowers, saltmarsh plants, and seagrass. Over 3 million plants produced annually across UK sites.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels7 records

Core offering

Salix designs, builds, manufactures, and supplies nature-based solutions for river restoration, wetland creation, and erosion control across the UK. It operates as both principal design & build contractor and specialist subcontractor, and manufactures an integrated product range including pre-established coir rolls and pallets, biodegradable erosion control blankets, ecologically sensitive rock revetments, VMax turf reinforcement mats, HydraCX hydraulic erosion control, silt control products, and native wetland, saltmarsh, moorland, and sand dune plants grown at its own UK nurseries.

Product overview

Salix offers an integrated portfolio of nature-based solutions combining design, build, manufacturing, and plant cultivation for river restoration, wetland creation, and erosion control. The product portfolio is organized into five main categories: (1) Sustainable Coir Products including Pre-established Coir Rolls and Coir Pallets that provide immediate erosion control while vegetation establishes; (2) Ecologically Sensitive Rock Products including Rock Rolls, Rock Mattresses, and Aqua Rock Bags that offer permanent erosion protection while allowing natural sediment accretion and vegetation; (3) Biodegradable Erosion Control including Bionet C125BN, CocoBN, and CocoNet 800 for temporary soil protection during vegetation establishment; (4) Native Plants including Wetland Plants, Salt Marsh Plants, Moorland Plants, and Sand Dune Plants grown at their UK nurseries; (5) Silt Control including SiltMat, FlocMats, Silt Wattle, and Silt Bubble Barriers for sediment and pollution control during construction and restoration works. Additional products include HydraCX hydraulically applied erosion control, Terra-Lock anchoring systems, VMax turf reinforcement mats, Brushwood Fascines, and Live Willow Revetments. Salix operates the largest native wetland plant nursery in the UK with two sites producing over 3 million plants annually across 280+ native species, and is Europe's largest producer of coir fibre rolls.

Differentiator

Problem solved

Functional benefit

Products and services

• Design & Build Contracting Services Integrated design and build services for river restoration, wetland creation, erosion control, and civil engineering projects. Salix operates as both principal contractor and specialist subcontractor, deploying its own machinery (including Spider equipment) and installation teams. Customers include water utilities, local authorities, main contractors, and private clients.
• Pre-established Coir Rolls Organic living revetment providing erosion control and rapid vegetation establishment. Pre-planted with native wetland species mixes and grown in wet conditions for one to two years before installation so plant roots bind through the fibre. Provides up to 85% CO2 saving compared to imported ready-made coir rolls.
• Pre-established Coir Pallets Wide range of pre-established coir pallets planted with high quality native plant species, composed from coir fibre, a sustainable waste product from the husk of the coconut shell. Used for riverbank and shoreline stabilisation.
• CocoNet 800 Strong hand-woven biodegradable erosion control net made from coir fibre, providing immediate erosion protection while allowing vegetation to grow. Design life varies from 36-60 months; standard roll size 2m x 40m.
• Bionet C125BN Biodegradable erosion control blanket providing immediate short-term soil protection from high rainfall and fluvial events. Features coconut fibre stitched with biodegradable jute thread between jute fibre nets; design life approximately 24 months.
• CocoBN Highest performing fully biodegradable erosion control matting for high flow applications where environmental sensitivity is critical. Made from sustainably sourced coir with high strength coir netting; blanket degrades over 24 months and netting lasts 36-60 months.
• HydraCX Hydraulically applied erosion control product that protects slopes against soil and seed loss from heavy rain and wind from day one of application. 100% natural, consisting of reclaimed cotton and straw fibres with polymer and tackifier. Used on highway and rail embankments.
• Aqua Rock Bags Ecological revetments using mesh bags filled with graded angular stone for use in rivers, deep water and intertidal projects. Provides high interstitial space for benthic invertebrates and fish fry, and supports submerged and marginal macrophyte vegetation. Available in 2T, 4T and 8T sizes.
• Pre-filled Rock Rolls Robust and permanent revetment for use around reservoirs, shorelines, lake edges, streams and river banks, providing permanent erosion protection while allowing natural sediment accretion and vegetation establishment.
• Pre-filled Rock Mattresses Robust and permanent revetment for use around reservoirs, shorelines, lake edges, streams and river banks. Cost-effective alternative to rock rip-rap and gabions with natural vegetation capability.
• Brushwood Fascines Natural fascines for use in rivers, canals and lakes, made from sustainable brushwood sources. Available in various timber types including Ash, Hazel and Willow.
• Live Willow Revetments Traditional method of controlling riverbank erosion using living willow, employing traditional techniques and modern approaches based on site-specific erosion processes.
• Terra-Lock Anchoring System Turnkey solution for soil erosion control and geotechnical stability using Turf Reinforcement Mats (TRMs) with Gripple Ground Anchors.
• VMax³ C500 Turf Reinforcement Mat High tensile strength, 22mm deep 3D skeleton Geomat with an additional coir fibre composite layer for permanent erosion protection.
• VMax³ C350 Turf Reinforcement Mat Permanent turf reinforcement mat incorporating a coir fibre layer for instant erosion protection, with a three-dimensional grid providing significant long-term protection.
• VMax³ P550 Turf Reinforcement Mat Permanent ultra-high-strength three-dimensional matting structure incorporated with a 100% polypropylene fibre matrix for permanent erosion control applications.
• VMax³ Shear Stress Turf Contract-grown turf using the VMax range of Turf Reinforcement Mats (TRMs) as the reinforcement element, providing high scour protection performance.
• Silt Bubble Barriers Micro bubble linear diffusers that control turbidity and pollution downstream of river restoration works and construction sites. Deliver oxygen where needed with no chemicals or moving parts. Supplied from Frog Environmental.
• Silt Wattle Natural sediment and water erosion control method designed to slow flow in channels and treat muddy water by capturing sediment. Made from recycled wood waste contained in tubular netting; available in 20cm, 30cm or 40cm diameter rolls. Supplied from Frog Environmental.
• SiltMat Sediment control mat positioned in river bed downstream of earth or river bed disturbances. Captures silt deposits to reduce sediment deposition; capable of containing more than 20 kg of sediment per m². 100% biodegradable. Supplied from Frog Environmental.
• FlocMats Water treatment mats for fine sediment control in polluted water, designed for water quality management on construction and river restoration sites. Made from 100% natural fibre; available in flocculant-treated (Water Lynx) or untreated form. Can be used with Pipe Reactor.
• Native Wetland Plants Largest grower of native wetland plants in the UK for use in green infrastructure, peatland restoration, wetland creation and habitat projects. Over 3 million plants produced annually across 280+ native species at the Croxton and Laugharne sites.
• Salt Marsh Plants Salt marsh plant species grown for coastal and tidal restoration projects. Salix is the only UK nursery growing salt marsh plants on a commercial scale.
• Native Moorland Plants Native moorland plant species for habitat restoration and erosion control on upland sites.
• Native Sand Dune Plants Native sand dune plant species for coastal habitat restoration and stabilisation.

Quantifiable outcome

• 20km of degraded rivers restored in last 5 years
• +4 more outcomes

Named customers14 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Eight partnerships are on record, tiered core and minor.

• RSK GroupcoreStrategic or Co-development PartnerRSK Group acquired Salix, integrating the company into a broader environmental consultancy group. Salix operates as part of the RSK Group, leveraging shared resources and expertise across environmental disciplines.
• Project SeagrasscoreStrategic or Co-development PartnerPartnership with Project Seagrass to develop seagrass nursery near Laugharne for restoring UK's lost seagrass meadows. Salix grows and supplies seagrass plants and seed for restoration schemes. Supported by Ofwat Innovation project. UK goal is to restore 30km² of seagrass by 2030.
• Norfolk Rivers TrustcoreStrategic or Co-development PartnerCollaboration with Norfolk Rivers Trust on chalk river restoration projects including River Babingley at Hillington Estate and River Nar at Pentney, improving wildlife habitats and achieving Good Ecological Status under Water Framework Directive.
• European Soil and Water Engineering Group (ESWEG)coreStrategic or Co-development PartnerFounding member of ESWEG collaborating with experts from France, Germany, Holland, Spain, and Scandinavia. Over 1,000 bioengineering projects completed through this partnership.
• North American GreenminorOEM/ Whitelabel/ Licensing PartnerSalix holds exclusive UK rights to North American Green erosion control product range, now manufactured in Europe.
• Frog EnvironmentalminorChannel Partner/ Reseller/ DistributorSalix supplies Frog Environmental's sediment control products including SiltMats, Silt Wattles, and Bubble Tubing. Products distributed through Salix's customer base.
• CBEC Eco-engineering UK LimitedcoreStrategic or Co-development PartnerCBEC Eco-engineering UK Limited is an associated company working with Salix on river restoration projects including River Nairn. Joint projects use process-based river restoration approaches.
• The Aberarder EstateminorStrategic or Co-development PartnerPartnership with The Aberarder Estate on award-winning River Nairn renaturalisation project, funded by SEPA, allowing river to meander again and restore natural processes.

Scale indicators11 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Maccaferri: Global manufacturer of gabions, geogrids and erosion-/riverbank protection systems used as an alternative or complement to Salix's nature-based bioengineering solutions. Directly competes in erosion control and channel/riverbank protection, especially on infrastructure and hydraulic works.
• Tensar International: UK-headquartered provider of geosynthetics, ground stabilisation and erosion-control products for civil engineering and infrastructure projects. Comparable to Salix in serving UK contractors and infrastructure developers with soil-reinforcement and erosion-protection solutions.
• Huesker: Manufacturer of geosynthetics, erosion control mats and geotextiles used in hydraulic and civil engineering applications. Overlaps directly with Salix's coir-based and synthetic erosion-control product lines in transportation, waterway and slope-stabilisation projects.
• Profile Products (North American Green): Owner of North American Green, a major supplier of erosion control blankets, turf reinforcement mats and hydraulically applied products — Salix's exclusive UK partner for this range. Direct competitor globally in the same product categories Salix supplies into the UK market.
• Greenfix: UK-based supplier of biodegradable coir and jute erosion-control products, blankets and geotextiles. Closest UK-headquartered direct competitor to Salix's sustainable coir products line, serving the same civil engineering and landscaping channels.
• Jeremy Benn Associates (JBA Consulting): UK specialist consultancy in flood risk management, river restoration, hydrology and water environment. Direct peer in river-restoration design and environmental engineering services, frequently working with Environment Agency, water companies and local authorities — the same customer set as Salix.
• Hydrock: UK environmental, geotechnical and engineering consultancy with a water-environment and river-restoration practice. Comparable to Salix in delivering design, assessment and construction support for river, flood and infrastructure projects across the UK.

Regional players

• Cirtex: Manufacturer and distributor of geosynthetics and erosion-control products across Australasia. Comparable to Salix in product mix (geotextiles, erosion control mats, rock bags) but operates in a different geography (NZ/Australia vs UK).

Broad incumbents

• Arcadis: Global design and consultancy firm with significant water, environment and resilience practices. Competes with Salix in river restoration and water-management advisory work as part of a much broader portfolio, rather than specialising in nature-based bioengineering delivery.
• Mott MacDonald: Major global engineering, management and development consultancy with extensive water, environment and river-restoration capabilities. Overlaps with Salix on flood-risk, WFD-driven and river-engineering projects but as one capability within a much wider services portfolio.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@salixriverwetland
• Instagraminstagram.com/salix_rw
• LinkedInlinkedin.com/company/salix-river-and-wetland
• Xx.com/salixbio
• Facebookfacebook.com/SalixBio

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Salix