kSIST FprEN 17733:2026

• Abstract:

  This document specifies references to methods for sampling of soil improvers and growing media and sample preparation of soil improvers and growing media for subsequent determination of quality and quantity.; This document is applicable to the fertilizing product blends where a blend is a mix of two or more fertilising products belonging to the categories of fertilizers, liming material, soil improvers, growing media, inhibitors and plant biostimulants, and where soil improvers and/or growing media are the components with the highest percentage in the blend by mass or volume, or in the case of products in liquid form by dry mass. If the soil improvers and/or growing media are not the components with the highest percentage in the blend, the European Standard relevant to the component with the highest percentage in the blend applies. In case a blend is composed of fertilising products mixed in equal quantities, the user of the standard decides which standard to apply.; NOTE A soil improver or a growing medium consists of a single bulky (volume-building) component or a mix of bulky (volume-building) components (for example peat, wood fibres, coconut coir, compost, expanded perlite).

• Status: Not Published
• Public Enquiry End Date: 01-Feb-2026
• ICS: 65.080 - Fertilizers
• Technical Committee: KAT - Soil quality
• Current Stage: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 29-Sep-2026
• Due Date: 17-Nov-2026
• Directive: 2019/1009 - Regulation (EU) 2019/1009 of the European Parliament and of the Council of 5 June 2019 laying down rules on the making available on the market of EU fertilising products and amending Regulations (EC) No 1069/2009 and (EC) No 1107/2009 and repealing Regulation (EC) No 2003/2003 (Text with EEA relevance)
• Mandate: M/560 - [C(2019) 1725 final] Ecodesign requirements for air heating products, cooling products, high temperature process chillers and fan coils in support of Commission Regulation (EU) 2016/2281
• Mandate: M/564 - Fertilising products in support of Regulation (EU) 2019/1009
• Mandate: M/564 Amd 1 - amending Implementing Decision C(2020) 612 as regards certain harmonised standards and standardisation deliverables, deadlines for their adoption and the duration of the validity of the standardisation request
• Mandate: M/564 Amd 2 - Commission Implementing decision amending Implementing Decision C(2020)612 as regards harmonised standards, the deadlines for the adoption of those standards and the duration of the validity of the standardisation request to the European Committee for Standardisation as regards the EU fertilising products in support of Regulation (EU) 2019/1009 of the European Parliament and of the Council
• Mandate: M/XXX - Commission Implementing Decision of XX.XX.202X on a standardization request to the European Standardization Organizations as regards tumble dryers in support of Commission Delegated Regulation (EU) 2023/2534 of 13.7.2023 with regards to energy labelling of household tumble dryers, as amended by Delegated Regulation (EU) 2025/1353 of 1.7.2025 regarding information on repairability for household tumble dryers.
• Ref Project: FprEN 17733 - Soil improvers and growing media - Methods for sampling and sample preparation

• Revises: SIST-TS CEN/TS 17733:2022 - Soil improvers and growing media - Sampling and sample preparation
• Effective Date: 01-Jan-2026

Overview

kSIST FprEN 17733:2026 is a draft European standard for soil improvers and growing media that focuses on methods for sampling and sample preparation. Published by SIST and aligned with the European standardization process, it supports reliable quality and quantity determination for products used in agriculture, horticulture, and related sectors.

This standard is especially relevant for organizations working with fertilizing product blends. It clarifies when the document applies to blends containing fertilizers, liming materials, soil improvers, growing media, inhibitors, and plant biostimulants. In practice, the standard helps users select the correct sampling and preparation approach when soil improvers or growing media are the main components of the blend.

Key Topics

• Sampling methods for soil improvers and growing media

  • References the appropriate procedure for collecting representative samples
  • Supports subsequent testing for quality and quantity

• Sample preparation

  • Directs users to the correct preparation method depending on the analysis type
  • Includes preparation for chemical and physical tests
  • Includes preparation for microbiological examination

• Blend applicability

  • Applies when soil improvers and/or growing media are the highest-percentage components by mass, volume, or dry mass for liquid products
  • If another fertilising product category dominates, the relevant European standard applies
  • If components are mixed in equal quantities, the user decides which standard to apply

• Reference framework

  • Links to EN 12579:2024 for sampling
  • Links to prEN 13040-1:2025 for chemical and physical test preparation
  • Links to prEN 13040-2:2025 for microbiological sample preparation

Applications

This standard provides practical value for laboratories, manufacturers, inspectors, and quality control teams involved in soil improvers, growing media, and EU fertilising products. It is useful in workflows where consistent sampling is essential to ensure dependable test results and comparability across product batches.

Typical application areas include:

• Quality control of bulk soil improvers and growing media
• Laboratory testing for chemical, physical, and microbiological parameters
• Production and compliance checks for fertilising product blends
• Regulatory support for products placed on the market under EU fertilising product requirements
• Sampling planning for solid, pre-shaped, and liquid materials where applicable

Related Standards

• EN 12579:2024 - Soil improvers and growing media - Sampling
• prEN 13040-1:2025 - Sample preparation for chemical and physical tests, dry matter content, moisture content, and laboratory bulk density
• prEN 13040-2:2025 - Sample preparation for microbiological examination
• prEN 17732:2025 - Soil improvers and growing media - Terminology
• Regulation (EU) 2019/1009 - EU fertilising product requirements

For organizations searching for soil improvers sampling standard, growing media sample preparation, or fertilizing products quality control, kSIST FprEN 17733:2026 is an important reference for consistent and standardized laboratory and field procedures.

SLOVENSKI STANDARD
oSIST prEN 17733:2026
01-januar-2026
Izboljševalci tal in rastni substrati - Metode za vzorčenje in pripravo vzorcev
Soil improvers and growing media - Methods for sampling and sample preparation
Bodenverbesserungsmittel und Kultursubstrate - Probenahme
Amendements organiques et supports de culture - Echantillonnage
Ta slovenski standard je istoveten z: prEN 17733
ICS:
65.080 Gnojila Fertilizers
oSIST prEN 17733:2026 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 17733:2026
oSIST prEN 17733:2026
DRAFT
EUROPEAN STANDARD
prEN 17733
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2025
ICS 65.080 Will supersede CEN/TS 17733:2022
English Version
Soil improvers and growing media - Methods for sampling
and sample preparation
Amendements du sol et supports de culture - Méthodes Bodenverbesserungsmittel und Kultursubstrate -
d'échantillonnage et de préparation de l'échantillon Methoden für Probenahme und Probenvorbereitung
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 223.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17733:2025 E
worldwide for CEN national Members.

oSIST prEN 17733:2026
prEN 17733:2025 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Sampling and sample preparation . 5
Bibliography . 7

oSIST prEN 17733:2026
prEN 17733:2025 (E)
European foreword
This document (prEN 17733:2025) has been prepared by Technical Committee CEN/TC 223 “Soil
improvers and growing media”, the secretariat of which is held by NEN.
This document will supersede CEN/TS 17733:2022.
prEN 17733:2025 includes the following significant technical changes with respect to
CEN/TS 17733:2022:
— The title has been revised;
— Redundant information has been removed from the Introduction;
— An applicability statement has been included in the Scope;
— Clause 2, Normative references, has been updated;
— The ISO and IEC terminology databases have been removed from Clause 3, Terms and definitions;
— Requirements for sampling and sample preparation
...