FprEN 18299

FprEN 18299 is a draft European Standard from CEN for soil improvers and growing media. It specifies the reference methods to use for detecting Salmonella spp. and enumerating Escherichia coli and enterococci in these products and in certain fertilising product blends. The document is for people who need to choose the correct sampling, sample-preparation, and microbiological test standards for compliance work.

What does FprEN 18299 specify?

FprEN 18299 specifies which other standards are to be used for sampling, sample preparation, detection, and enumeration, but it does not contain the laboratory methods themselves. It is intended for soil improvers and growing media, plus blends where those materials are the main components.

The scope matters because blend classification changes which standard applies. If soil improvers and/or growing media are the highest-percentage components in the blend, this document applies; if another fertilising product category dominates, the standard for that dominant component applies instead. For equal blends, the user decides which standard to use.

What are the key requirements of FprEN 18299?

FprEN 18299 is mainly a routing document: it tells the reader which standards to follow at each step of microbiological checking. In practice, that means the user must link the product type, sampling route, sample preparation route, and the final detection or enumeration method.

Sampling and sample preparation

Clause 4 requires sampling in accordance with EN 12579:2024 and sample preparation in accordance with prEN 13040-2:2025. This matters because incorrect sampling or preparation can distort the microbiological result before testing even begins.

Detection of Salmonella spp.

Clause 5.1 requires detection of Salmonella spp. in accordance with prEN 18278:2026. For the reader, this means the standard points to the separate method that must be used when Salmonella spp. is the target organism.

Enumeration of Escherichia coli

Clause 5.2 requires enumeration of Escherichia coli in accordance with prEN 18280:2026. In practice, users do not design their own counting approach here - they follow the referenced enumeration standard for the result they need.

Enumeration of enterococci

Clause 5.3 requires enumeration of enterococci in accordance with prEN 18279:2026. This is relevant where a specification, regulation, or contract asks for enterococci results alongside Salmonella spp. or Escherichia coli.

Terms and definitions

Clause 3 uses the terms and definitions from prEN 17732:2025. That keeps the vocabulary aligned with the wider soil improvers and growing media series, which helps when documents are used together in procurement, testing, and compliance files.

EU regulatory link

Annex ZA ties the document to Regulation (EU) 2019/1009. It maps clause 4 and clause 5.1 to 5.3 to the essential safety requirements for PFC 3 organic soil improvers, PFC 3 inorganic soil improvers, and PFC 4 growing media, which is why the document is useful in conformity assessment.

What terms does FprEN 18299 define?

FprEN 18299 relies on the terminology in prEN 17732:2025, and the following terms are central to how the document is used:

• Soil improvers - products intended to improve the properties of soil; in this document they are one of the main product types in scope.
• Growing media - bulky materials or mixes used as a substrate for plant growth; they are the other main product type in scope.
• Blend - a mix of two or more fertilising products, where the dominant component determines which standard applies.
• Salmonella spp. - the target pathogen for detection in this document.
• Escherichia coli - the organism whose amount is enumerated as part of microbiological checking.
• enterococci - the organism group whose amount is enumerated alongside Escherichia coli.
• PFC - product function category under Regulation (EU) 2019/1009, used here for soil improvers and growing media.

Who uses FprEN 18299?

FprEN 18299 is used by laboratories, manufacturers, and conformity assessment teams working with soil improvers, growing media, and qualifying fertilising blends. It is also relevant to quality managers, technical buyers, and regulatory specialists who need to specify the correct microbiological test route.

In practice, it helps users decide which standards to apply for sampling, sample preparation, and the three microbiological determinations covered by the document. It is especially relevant where results are needed for product release, specification checks, or evidence of alignment with Regulation (EU) 2019/1009.

Which standards are used with FprEN 18299?

FprEN 18299 depends on several companion standards:

• prEN 17732:2025 - provides the terminology and definitions used across the series.
• EN 12579:2024 - gives the sampling method.
• prEN 13040-2:2025 - gives sample preparation for microbiological examination.
• prEN 18278:2026 - gives the method for detection of Salmonella spp.
• prEN 18280:2026 - gives the method for enumeration of Escherichia coli.
• prEN 18279:2026 - gives the method for enumeration of enterococci.

These references are important because FprEN 18299 itself does not duplicate the procedures.

What does the FprEN 18299 document contain?

The document contains a foreword, an introduction, five clauses, Annex ZA, and a bibliography. Clause 4 covers sampling and sample preparation, and clause 5 covers detection and enumeration by pointing to the relevant separate standards.

Annex ZA is informative and gives the relationship to Regulation (EU) 2019/1009, including a correspondence table that links the clauses of this standard to the essential safety requirements for the relevant product function categories. For a reader, the document is therefore a map from product type to the correct test standards and the EU conformity context, not a full microbiology method description.