Southern Trident Limited

Southern Trident is a manufacturer of high quality, award-winning, peat-free composts and other growing media sold under our brand names of Coco & Coir and Harmony Gardens.

Coco & Coir contains a range of lightweight, easy to carry and use, compressed coir brick growing media as well as a bagged compost and mulch, plus numerous coir-based pots, basket liners and other growing accessories. Our new Houseplant Compost has won DIY Weeks coveted Garden Product of the Year 2023.

Harmony Gardens, the worlds only carbon-neutral peat-free compost includes a wide range of growing media with four new launches for 2023/24 all with tried, tested and proven formulations.

Harmony Gardens Multipurpose Compost received the Best New Growing Media Product and the Sustainability Award at Glee 2021. Its Ericaceous Compost won Four Oaks, Best Retail garden Product 2022.

All products in the Southern Trident portfolio are made exclusively from environmentally-responsible by-products and recycled raw materials.

Southern Trident has been awarded Soil Association accreditation for it coir supply.

The company is carbon neutral across all areas of the business, has won an International Green Apple Environment Award from The Green Organisation, and has become a Green World Ambassador.

Southern Trident is an inaugural accredited member of the Responsible Sourcing Scheme for Growing Media (RSSGM), working with Defra, the RHS, NGO’s like Plantlife, retailers and other manufacturers.

We are launching some exciting new products at Glee 2022. You’ll just have to come and see us on stand 6H54-J55 to find out more!


United Kingdom


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  • Coco & Coir Houseplant Compost Wins!

    26 May 2023 Steve Harper
    Southern Trident is thrilled to announce that it has been honoured with the highly esteemed Best Garden Care Product award for its new Coco & Coir Houseplant CompostĀ 
  • Coco Burn

    26 May 2023
    New cocnut shell based BBQ charcoal briquettes. Burn longer and hotter than wood-based charcoal with =out the need to chop down 1.6m trees each year.
  • New Houseplant Compost range, expands to 9L's in minutes and proven to reduce Fungus Gnat infestations. Garden Care Product of the Year 2023
  • Microgreens

    26 May 2023
    Whether a keen gardeners or a novice this is the ideal product to grow a crop in 7-10 days. Contains propagator, growing mats, seeds and instructions.
  • The worlds only carbon-neutral peat-free compost, proven in the lab, in growing trials and in the garden!