Description
ORCA Premium Liquid Mycorrhizae 946ml is a liquid-format mycorrhizal inoculant containing multiple beneficial fungal and bacterial species in a highly concentrated suspension, designed for easy incorporation into hydroponic nutrient solutions and watering regimens. We have been recommending ORCA to UK growers since 2017 as an innovative approach to biological root zone enhancement that overcomes the application challenges of powder-based mycorrhizal products — particularly in recirculating hydroponic systems where powder products can clog delivery lines and accumulate in reservoirs.
Why ORCA Liquid Mycorrhizae Works Differently
Traditional mycorrhizal powders must be applied directly to the root zone at transplant because the spores cannot travel through an irrigation system. ORCA uses a liquid suspension of propagules — mycorrhizal spores, rhizobacteria, and beneficial fungi — that can be added directly to nutrient solution and delivered through drip systems, NFT, and other hydroponic irrigation methods. The microbial community in ORCA works synergistically: mycorrhizal fungi extend the root surface area and improve phosphorus uptake, rhizobacteria solubilise locked mineral nutrients and produce plant growth hormones, and Trichoderma species colonise the root zone and produce antifungal compounds that suppress root pathogens including Pythium and Fusarium. The 946ml bottle contains enough inoculant for multiple applications across a full grow cycle, allowing the beneficial microbial community to be established, maintained, and continuously reinforced through regular addition to irrigation water.
How to Use ORCA Premium Liquid Mycorrhizae
Use ORCA at 2–5 ml per litre of nutrient solution, starting from the first watering after transplant or rooting. Apply with every watering for the first two weeks to establish a robust microbial community, then reduce to once per week as maintenance throughout the grow. Shake the bottle well before each use to re-suspend any settled microbial matter. ORCA is compatible with most nutrient programmes but avoid using alongside strong fungicides or oxidising agents such as hydrogen peroxide immediately before or after ORCA applications. Keep refrigerated for maximum shelf life and check viability before use.
Pair ORCA Premium Liquid Mycorrhizae with Voodoo Juice, Tarantula, or Great White for a comprehensive biological root zone programme. Browse our full range of biological additives and root stimulants for the complete soil biology approach to high-performance growing.
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