TerraRhizae is a blend of endomycorrhizal fungae containing more than 222,000 spore propagules per kilogramme.

Mycorrhizal fungae create a symbiotic relationship between plant roots and the soil environment, increasing water and nutrient uptake whilst the plant provides the mycorrhizae with carbohydrates.

Mycorrhizae are important for the long-term health of plants, being able to convert inorganic minerals such as phosphate into plant-available forms and thereby accessing nutrients that are inaccessible to plant roots.