13 november 2026
In this edition of ‘RHP Stories: Committed to Quality’, we highlight Legro in The Netherlands. In this series, we talk to certified companies about what RHP certification means to them and what it has brought to their business.
“Legro has been RHP certified since 1990, initially for potting soil within the Horticulture field of application. Today, we are certified for three fields of application: Horticulture, Consumer and Mushrooms, and we process raw materials including peat, perlite, coir and wood fibre. With RHP certification, we safeguard the quality of our growing media, minimise risks and benefit from the expertise and exchange of knowledge within RHP.”
“One important benefit is the collective research within RHP, the knowledge centre for substrates. This allows the entire growing media sector to benefit from new insights and knowledge, without each individual company having to conduct its own research.”
“The RHP quality mark provides customers and growers with greater assurance regarding the quality and safety of our growing media. It minimises risks for cultivation and gives them confidence in the product we supply.”
“We are proud of the RHP quality mark because it underlines the high quality of our growing media. In addition, our involvement in research and knowledge exchange within RHP contributes to our strong position as a Dutch growing media company and a leading knowledge partner within the sector.”
“We see opportunities particularly in the use of new renewable raw materials, such as spent substrate and cultivated plant fibres. Following the Dutch covenant on the environmental impact of potting soil and growing media, research into these materials is being carried out together with RHP, research institutes and the sector. By identifying risks and developing quality requirements, we aim to enable these raw materials to be used safely and responsibly in RHP-certified growing media in the future.”
“The RHP quality mark has evolved from a Dutch quality standard into an internationally recognised quality mark for growing media. We are proud that the importance of quality is increasingly recognised internationally and that Legro has been involved almost from the very beginning.”
