Trichoderma is not naturally occurring, but introduced by the substrate manufacturers to introduce specific requirements. And there are many strains in the Trichoderma family, some of which are stronger than others. Coco & Coir does not add anything to Coco Grow, keeping a neutral growing media suitable for a range of uses including growing mushrooms. ‘Inoculated’ substrates, use of strong chemicals and even boiling water is not recommended as it would kill the beneficial microbe colonies.