Tetrim Teas was established as a not-for-profit company in 2021, with the aim of working with the community and local growers across Wales to ethically develop more products. We are a family business with Mari managing the business, her nephew Steffan blending the tea and business and community support from Kelly and Helen. And more recently, a dedicated team of six mushroom growers in Carmarthenshire, Gwynedd and Ceredigion.

The idea for Tetrim Teas came from Mari’s previous experience working selling Chinese teas at her Cardiff health spa, she decided to set up a sustainable company based in Wales with an ethical business model using locally-sourced ingredients to organically build a stronger local community.

After deciding to establish a tea company, Mari wanted to build it on ethical and sustainable foundations. She investigated local ingredients in partnership with Aberystwyth University, AberInnovation and Bic Innovation.
"As part of this work we discovered a family business on Anglesey that grew rhubarb, where much of the root is discarded each year. We selected this local supply of rhubarb root as the main ingredient for our first tea blend. As a result this brings the product’s carbon footprint down considerably."

In addition, the tea is blended with quality green tea from the Dartmoor Estate Tea, Tetrim continue to research more local suppliers for all the ingredients, and to build a local supply chain for all aspects of the business. 

We've expanded our wellbeing collection with two distinctive Lion's Mane mushroom blends - one energising with chilli, ginger and cardamom, the other comforting with Welsh heritage apple and cinnamon - alongside our newest Spring Hedgerow Tea, hand-foraged from local Welsh botanicals. 
But we're not stopping there. We're now cultivating our own Lion's Mane mushrooms right here across Wales, bringing the entire journey from soil to cup under our careful stewardship. This means fresher, more potent mushrooms, deeper connection to our Welsh landscape, and complete control over the quality that goes into every blend. It's the natural next step for a company rooted in Welsh terroir and committed to authentic, locally-sourced wellness.

As a company rooted in our community, we have established a number of community projects.
Tŷ Te Trimsaran Tea Hub has weekly meetings in our home village of Trimsaran, a safe place for people to come together over a cup of tea, and to chat or learn Welsh.
A tea growing project in the village school has involved the Eco Committee growing tea plants and will make their own flavoured teas once the plants are ready.
Tea popups are organised to test new flavours and recipes with different communities, aimed as a social gatherings and informing future tea development.