Mycorrhizal fungi exist in nearly all soils. These extraordinary fungi provide a secondary root system for the plant. Imagine a wider and more efficient network attached to the plant’s roots beneath the ground. A network composed of fungi with spreading spidery arms extending beyond the plant roots. These fungi are highly efficient at absorbing water and nutrients (particularly phosphorus) from the soil. GrowMad have put together a complete list of suppliers. We've listed all the suppliers alphabetically on the left, with our recommendations to the right. Check them out - Grow On, You'd be Mad not to!