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After more than 42 years within ROCKWOOL – including 30 years at Grodan and the last 14 years as Managing Director – Hub Janssen will step down from his role as Managing Director, effective 31 January 2026. We thank Hub for his leadership and the many contributions he has made to Grodan’s growth and success.
Horst, the Netherlands, October 6, 2025 – Grodan, Limgroup, and Delphy Innovative Soft Fruit Center (ISFC) proudly announce a record-breaking harvest of greater than 20 kilograms strawberries per m², using innovative F1 hybrid seeds cultivated on Grodan stone wool solutions.
In its second year, a trial from Grodan and Signify demonstrated it's possible to produce high-quality cherry tomatoes with significantly less heat input than previously thought, without compromising on quality and taste. Building on these results and a commitment to low energy growing, the partners are extending this year the trial at Botany to larger tomatoes on the vine.
Grodan, a leading specialist in stone wool growing media, has developed a patented vermiculite-free solution for high-tech propagation of tomatoes, peppers and cucumbers. The new plugs and blocks improve the sowing process while maintaining optimal germination rates and top-performing plant quality in both the propagation and cultivation phase.
Grodan, a global leader in innovative stone wool substrate solutions for professional horticulture and Hoogendoorn Growth Management, a global leader and innovator in horticultural automation, have joined forces to integrate rootzone data from Grodan’s GroSens sensors directly into the IIVO climate computer. This integration provides growers with direct access to accurate, reliable rootzone sensor data - enabling smarter, faster, and more precise irrigation decisions.
Do you ever wish you could view your irrigation data alongside data about other greenhouse parameters, without having to switch between platforms? Thanks to the new API functionality of GroSens Suite, you can – with no extra hardware necessary!
We are a global leader in the supply of innovative stone wool substrate solutions for the professional horticultural based on Precision Growing principles.
