Sourcing mycorrhizal fungal cultures from China

Duty and the culture classification

Read from the UK Trade Tariff on 5 October 2026, heading 3002 includes cultures of micro-organisms excluding yeasts. The candidate line for non-pathogenic mycorrhizal fungal cultures is 3002 49 00 20, carrying 0% duty from China. The supplied tariff record shows no anti-dumping or countervailing duty and no suspension for this line.

The UK Trade Tariff attaches Veterinary control and Animal Health Certificate controls to this line. Their application to a particular fungal culture from China is not established here. Give your customs broker the complete culture-medium and carrier composition, including any animal-derived ingredients, and confirm the requirements before dispatch.

The table shows purchasing formats sharing the same candidate line, rather than separate tariff subdivisions. Confirm the commodity code using the species, formulation, carrier and intended use. The Rhizobium inoculant guide covers another microbial culture family within this heading.

Specify the fungus, carrier and intended claims

Specify the fungal species and strain, whether the inoculum contains spores, colonised roots or other fungal material, and the complete carrier composition. Agree an infective-propagule specification, the laboratory method used to assess it, target host plants, application instructions and remaining shelf life on arrival. Ask for batch-specific evidence rather than a general product brochure.

In England and Wales, importing, moving or keeping soil from China requires authorisation. Ask the Animal and Plant Health Agency to assess any soil, root fragments or organic carrier against the intended use before ordering. Do not assume an authorisation permits ordinary retail supply.

Whether a biostimulant falls under plant protection product regulation depends on its claims and effects. Check proposed disease-control claims before printing labels: pesticide products must be authorised before use, sale, supply or storage. Agree the regulatory route alongside the specification.

Worked duty example

Illustrative example, not a quote: Illustrative nursery trial order of 500 kg of mycorrhizal cultures; values are illustrative under 3002 49 00 20, invoiced at £4,000 free on board, with £1,500 of freight and insurance to the UK. The customs value is £5,500. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £5,500, so it is £1,100. With no duty, the only import tax is the VAT, which a VAT-registered importer can usually reclaim. The import duty and VAT guide explains each step.

Inspection checklist

Identity: match the declared species, strain and carrier against the purchase specification, batch certificate and pack labels.

Activity: arrange batch testing using the agreed infectivity or host-root colonisation method; check that the report measures the promised activity rather than only total spores.

Condition: inspect seals, moisture, caking, leakage and unexpected growth; compare transit records with the supplier's agreed storage conditions.

Traceability: match batch identifiers and expiry dates across packs and reports, retain a sample, and check application instructions against the agreed host plants.

What goes wrong

A spore-count report can leave the buyer without evidence of the infective activity specified. An undeclared carrier, substituted strain or unexplained batch variation also makes the delivered material difficult to assess. Agree the acceptance method and test a retained arrival sample before distributing the batch.

A supplier may describe the product simply as beneficial fungi while omitting soil, root material or animal-derived medium ingredients. Obtain the full formulation before shipping and resolve the tariff controls with the broker. Review intended claims before ordering printed packaging.

Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For repeat volumes, see container programmes.