Grodan

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Horticulture with a Capital “H” — From Passion to Harvest

Why Grodan’s stone wool is the substrate of choice for Pura Hoja

Drain is not the goal in precision irrigation

Real-time GroSens data in your existing greenhouse management system

Actively steering the root zone microbiome in support of resilient growing

Our growing solutions

Grodan

Crops

Grodan offers a crop-specific range of substrate slabs for vegetable growing, specifically for tomato, cucumber, sweet pepper and aubergine crops.

Growing Solutions

Propagation

Grodan's blocks and plugs shape irrigation plans, ensuring consistent plant growth tailored to diverse conditions and growers' requirements.

Growing Solutions

Floriculture

Grodan specializes in substrates for floriculture, with a focus on rose and gerbera crops known for their perennial cultivation properties.

Designed to Grow

More than 50 years ago, we noticed a tiny plant growing in a piece of abandoned stone wool on a building site. Just as it's designed to do, nature had found a way to grow. And it inspired us to design a system to support it – a smarter, soilless way of growing that we evolve, explore and refine continuously. A system that promises high yields of consistent, high-quality fresh food and medicinal crops to feed and treat the world's growing population.

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Designed to grow sustainably
The substrate we have innovated to support soilless growing is made of stone wool – a clean and recyclable material formed of natural, abundant basalt rock. It's thanks to this material that soilless growing places minimal strain on our world's precious resources, using up to 20% less fertiliser, 50% less water and 75% less land that can be given back to nature to rest and rewild.
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Designed to grow from root to fruit
Growing crops, produce and plants soillessly means growing them reliably. Because both the conditions and the stone wool substrate they're grown in are reliable. Every decision made in the greenhouse today has a major impact on tomorrow's results. We support our deeply-rooted knowledge with our digital solutions to improve cultivation from root to fruit.
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Designed to grow anywhere, anytime
As the world's population continues to grow, so too does the need for healthy, fresh food and medicinal crops. Since our soilless way of growing isn't dependent on season or location, it can be done anywhere, anytime, meaning it's reliable and consistent – and high yields can be readily available whenever and wherever they're needed.
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Designed to grow for biodiversity
Since our way of growing is soilless, it supports the human world without depleting the natural one. Using up to 50% less water and 75% less land, higher yields can be reliably achieved with a much smaller physical footprint. Meaning more land can be given back to nature to rest and rewild.
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Designed to grow with less water
Whatever the crop, our way of growing protects diminishing water supplies. While nothing can thrive without water, soilless growing allows plants to do so with up to 50% less of it than soil-based cultivation. And the water it does use is recycled and reused – as are the nutrients within it.
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Designed to grow for wellbeing
We know that innovative growers demand innovative solutions, which is why we aim to set new standards. Our clean stone wool substrate is brought to life by exactly the right systems and software needed to steer the growing process with close, careful precision – for excellent yields of medicinal crops and healthy, fresh food. Reliably high-quality plants that can help tackle many of the world's health issues.
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Designed to grow together
Those who work with us, grow with us, collaborating as we explore a purpose-led path together. One that starts at the intersection of nature and tech. That includes sensors, stone wool and strawberries. Fresh produce, medicinal crops and sharing knowledge. We're a company for people who believe in feeding and treating the human world, without depleting the natural one – a company where everyone grows.
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Grodan Newsletter

Do you want to learn more about Grodan? Feel free to sign up to our newsletter. Grodan ensures that growers can make optimum use of its products and services by interpretting the company’s knowledge of and experience with substrate cultivation in terms of up-to-date, crop-oriented advice. Ranging from tailor-made advice from crop consultants to newsletters, seminars and training courses and articles in trade journals.

GroSens Suite product solution: GroSens 2.2 sensor, e-Gro software and Service Promise that ensures consistent data quality

Download our whitepapers

Whitepaper mock-up Grodan Fluence strawberry trial — How stone wool and lighting can change the game for strawberry growers
Grodan and Fluence, two leading horticultural solution providers, have completed an innovative demonstration trial aimed at exploring the opportunities for year-round cultivation of everbearing strawberries in a controlled environment.
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Mock-up low energy tomato growing end of trial whitepaper — Low-heat full-LED tomato trial achieves 50% reduction in heat
To help growers find a solution for cultivating a full-LED winter lit crop with a low heat input without impacting on yield or quality, Philips Horticulture LED Solutions and Grodan ran a joint trial at Botany Research Center, the Netherlands.
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Mock-up Strawberry whitepaper water management — Optimising water and nutrient management in strawberry cultivation
Why stone wool stands out in indoor strawberry cultivation? The choice for growing media is made prior to the start of each cultivation cycle and is important to achieve the most from a crop, specifically for strawberry cultivation.
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Strawberry whitepaper mock-up — The opportunities of indoor strawberry cultivation
Global strawberry cultivation is at a turning point. Growers are faced with sharp cost increases, while they also need to continue to guarantee high quality and consistent products, as consumers demand healthy, fresh fruits throughout the year. That is why commercial strawberry propagators and growers are constantly looking for ways to optimise their growth strategy, maximise their yields and minimise their costs.
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Mock-up strawberry whitepaper higher value is here — Whitepaper: Higher value is here
A recent trial by Grodan has demonstrated that strawberries can be propagated and cultivated on a stone wool substrate while maintaining high quality and attractive fruit size. Additionally, the yields and Brix values were higher than with traditional methods.
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Importance of data driven growing
Data science and AI technologies present us with so many opportunities to collect and mine data in the greenhouse. This paper will help you begin your journey to get the best out of your greenhouse data. There’s a bright future ahead!
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e-Gro — The start of data driven growing
High-tech greenhouse horticulture is preparing for a new, global transition to data-driven growing practices. In Horticulture 4.0, countless sensors and measuring systems collect a constant flow of data on growth conditions and the functioning of crops, from both visible parts of the plants as well as in the root zone environment. These multiple data flows and their correlation are analysed centrally and translated real-time into setpoints using sophisticated growth models and smart, self-learning software. The recommendations can be used to maximise the expected operating results. This is the ultimate form of Precision Growing.
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visual, whitepaper, TTL campaign, EC — Monitoring nutrient balance, pH & EC in the root zone
The composition of the nutrient solution should be appropriate to the needs of the crop. One of the benefits of using Grodan stone wool substrates is that the nutrient composition is under total control of growers. However the uptake of particular nutrients varies constantly with growth and fruit load therefore the nutrient balance, pH and EC in the root zone is also constantly changing.
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visual, whitepaper, TTL, EC — Improving tomato fruit quality
Have you ever wondered why at certain times of the year tomato crops are more susceptible to fruit quality disorders? For the most common physiological disorders namely blossom end rot (BER) and uneven colour (blotchy ripening) this whitepaper explains their cause and prescribes simple solutions to avoid / minimise risk of symptom expression in the first place.
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Grodan, visual, whitepaper, TTL, campaign — Irrigating in changing weather conditions with minimal drain volumes
The volume of irrigation water applied per square meter is linked to radiation sum as a general rule in the ratio 3.0 ml per joule. The exact figure will ultimately depend on outside weather influences such as wind speed, humidity as well as the greenhouse vent position. The question is whether this total drain volume is necessary or not? So what is the role of drain and what is a sufficient volume of the drain?
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Mockup strawberry article, Strawberry cultivation: Irrigating high tech greenhouse grown strawberries — Strawberry cultivation: Irrigating high tech greenhouse grown strawberries
This article explores innovative irrigation techniques for high-tech indoor strawberry cultivation using Grodan stone wool growing media. By leveraging its steerability, growers can precisely control water content (WC%) and electrical conductivity (EC), enhancing young plant quality and yields.
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Whitepaper, Grodan — Switch to Clean
Hydroponic lettuce and other leafy greens will soon start to dominate sales at supermarkets and chain restaurants. With up to 12 times the number of crops a year than from open fields and twice the crop density, no other production method can compete. Production environments must however be clean. Thanks to the high temperatures in its production process, stone wool is clean, making it ideal for producing hydroponic lettuce and other leafy greens.
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Our latest blogs

Sustainable Growing

Asian Propagation Seminar in Tokyo Highlights Clear ROI of High-Tech Propagation

The first Asian Propagation Seminar (APS) took place on 19–20 November in Tokyo, bringing together leading propagation experts, equipment providers and hundreds of growers and propagators from across the Asia-Pacific region. The central takeaway: investments in modern propagation — from advanced substrates to automation and LEDs — deliver clear, measurable returns.

Water Management

Sustainable Growing

Advancing Water Resilience in Agriculture

Brussels, Belgium, 20-11-2025 – Grodan recently hosted the stakeholder event “Advancing Water Resilience in Agriculture: Innovative Solutions for a Sustainable Future”, highlighting the growing importance of water resilience in agriculture.

Water Management

Sustainable Growing

Advancing Water Resilience through Controlled Environment Agriculture

Agriculture accounts for roughly 70 percent of global freshwater use, and extreme weather events—droughts, floods, and unpredictable rainfall—are putting even greater stress on the systems that feed us. Strengthening water resilience requires not just incremental efficiency gains, but a rethinking of how and where we grow crops.

Water Management

Sustainable Growing

Why seeds on stone wool are the recipe for higher-value strawberry production

Against the backdrop of the accelerating market transformation from low-tech to high-tech strawberry production, initial results from an innovative trial demonstrate the excellent compatibility between F1 hybrid strawberry seeds and Grodan stone wool solutions.

Part of ROCKWOOL Group

We are the leading supplier of fire resilient stone wool insulation providing solutions for all major application areas, including technical and OEM.

We are a global leader in the supply of innovative stone wool substrate solutions for the professional horticultural based on Precision Growing principles.

We provide customers with a complete ceiling system offer, combining panels with suspension grid systems and accessories.

We manufacture board material mostly used in ventilated constructions, for façade cladding, roof detailing, soffits and fascias.

Whistleblower policy

We encourages individuals to report misconduct, actions that are in violation of the law or our business ethics.

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Whitepaper: The future of medicinal crop cultivation

Whitepaper: How Grodan and Fluence are mastering the art of growing medicinal crops

Sustainability

Welcome to GrodanHorticulture with a Capital “H” — From Passion to Harvest

Our growing solutions

Designed to Grow

Designed to grow sustainably

Designed to grow from root to fruit

Designed to grow anywhere, anytime

Designed to grow for biodiversity

Designed to grow with less water

Designed to grow for wellbeing

Designed to grow together

Grodan Newsletter

Feel free to sign up

Thank you for your request

Download our whitepapers

How stone wool and lighting can change the game for strawberry growers

Low-heat full-LED tomato trial achieves 50% reduction in heat

Optimising water and nutrient management in strawberry cultivation

The opportunities of indoor strawberry cultivation

Whitepaper: Higher value is here

Importance of data driven growing

The start of data driven growing

Unlock the potential of AI driven decision making

Monitoring nutrient balance, pH & EC in the root zone

Steering and control of EC and WC in the slab under summer conditions

Making informed decisions in respect to water and EC management

Movement of water through plants

Understanding and steering the root zone environment

Steering WC & EC at the start of the cultivation

Improving tomato fruit quality

Irrigating in changing weather conditions with minimal drain volumes

Maintaining summer fruit quality

Optimizing nutrition to minimize fruit quality disorders

Strawberry cultivation: Irrigating high tech greenhouse grown strawberries

Switch to Clean

Our latest blogs

Part of ROCKWOOL Group