Rock Wool Slabs and Cubes for Modern Soilless Farming Systems

• Customization: Available
• Main Material: Basalt
• Density: 60–100 Kg/M³ (Customizable)
• Model NO.: Rock Wool
• Organic Content %: 4.3
• Shot Content %: 1.5~2.5
• Water Absorption %: >90
• Water Loss 24h(24h/Kg/M3 ): 0.009
• pH: 7-9
• Form: Cubes, Slabs, Blocks, Plugs
• Color: Yellow, Light Green
• Ecological Safety: Non-Toxic, Environmentally Friendly
• Chemical Stability: Inert and Non-Degradable
• Usage: Hydroponics, Eed Starting, Propagation
• OEM Support: Available (Sizes & Logo & Packaging)
• Hg %: None
• as %: None
• Transport Package: Cartons, Pallet
• Specification: Rock Wool Sizes 25mm 30mm 40mm 50mm 100mm 200mm
• Trademark: BD MINERALS
• Origin: Hebei
• HS Code: 6806109090

Product Description

Rock Wool

Our high-performance Rock Wool is a premium-quality inert growing substrate, widely used in modern hydroponic and horticultural applications. Manufactured by melting natural basalt rock or industrial slag at high temperatures and spinning it into fine fibers, rock wool offers exceptional physical and chemical properties ideal for commercial-scale agriculture.

This substrate is suitable for both run-to-waste and recirculating hydroponic systems, providing optimal aeration and water retention for plant root development. Thanks to its capillary action capability, rock wool efficiently distributes water and nutrients throughout the root zone, promoting vigorous and uniform plant growth.

Specification

Key Features:

Inert and Sterile: Free from pathogens, weeds, and pests. Rock wool resists microbiological degradation, offering a clean, stable medium for root growth.

High Water Retention & Aeration: Maintains ideal oxygen and moisture levels in the root zone,

minimizing the risk of root diseases and overwatering.

Excellent Capillarity: Ensures even water and nutrient distribution through slabs, cubes, or plugs.

Versatile Usage: Compatible with all hydroponic systems—NFT, ebb & flow, drip systems, and deep water culture.

Eco-Friendly Composition: Made from natural volcanic rock (basalt), reusable under certain growing conditions, and recyclable as a soil amendment.

Custom sizes available upon request

Grow Cubes (25mm, 30mm, 40mm, 50mm, 75mm, 100mm, etc.)
Starter Plugs (for seedling trays or cutting propagation)
Grow Slabs / Mats (Ideal for large-scale row crop systems)

Main Sizes: 

Rock Wool Cubes Sizes	Packing	Rock Wool Cubes Sizes	Packing
25*25*25mm	6400pcs/carton	75*75*75mm	320pcs/carton
25*25*30mm	5600pcs/carton	80*80*80mm	320pcs/carton
25*25*40mm	4000pcs/carton	100*100*70mm	216pcs/carton
30*30*40mm	3312pcs/carton	100*100*100mm	144pcs/carton
40*40*40mm	1932pcs/carton	145*145*145mm	48pcs/carton
50*50*40mm	1320pcs/carton	150*150*150mm	48pcs/carton
50*50*50mm	1056pcs/carton	200*200*200mm	18pcs/carton

Rock Wool Slabs Sizes	Packing
1000*200*100mm	125pcs/pallet
1000*200*75mm	165pcs/pallet
1000*150*100mm	160pcs/pallet
1000*150*75mm	208pcs/pallet

Product Photos

Application

Our rock wool substrate is widely adopted across multiple agricultural and horticultural sectors. It provides a stable, clean, and high-performing root zone environment for the following uses:

1) Hydroponic Vegetable Cultivation

Ideal for growing lettuce, spinach, kale, cucumbers, peppers, tomatoes, and herbs. The excellent water retention and air porosity of rock wool allow for faster growth, higher yields, and efficient resource use in all types of hydroponic systems.

2)Propagation and Seedling Production
Used in nurseries and plant factories for starting seeds or rooting cuttings. The uniform moisture and structure of rock wool cubes ensure strong root development, higher germination rates, and easy transplanting.

3)Greenhouse Horticulture
Suitable for ornamental flowers and greenhouse crops such as roses, carnations, and gerberas. Rock wool provides a pest-free, clean substrate for precise irrigation and fertigation, contributing to consistent flower quality.

4)Fruit Cultivation in Soilless Systems
Used for strawberries and other fruits in vertical or gutter-based soilless systems. It ensures good plant support and drainage, essential for long-term cropping.

5)Urban Farming and Vertical Systems
As an inert, lightweight substrate, rock wool is excellent for space-saving vertical farms and city agriculture projects, supporting efficient plant growth under artificial lighting and controlled environments.

6)High-Value and Precision Crops
For crops that require highly controlled environments and consistent growing conditions, rock wool enables precision in irrigation and nutrient delivery. Suitable for premium crops grown in CEA (Controlled Environment Agriculture) systems.

Packaging & Shipping

By cartons

Shrink-wrapped in PE film
Palletized for bulk shipment
OEM packaging support available for wholesalers and distributors

Why Choose US

With stable quality, strong water absorption, and superior structural integrity, our rock wool substrate is trusted by professionals across the hydroponic and greenhouse industries. Whether you are a commercial grower, system integrator, or wholesale distributor, our products offer the consistency and performance required for large-scale success.

In addition to rock wool, we also supply a variety of other high-quality growing media, including perlite, vermiculite, zeolite, expanded clay, and more— offering one-stop solutions for different cultivation needs.

All products are manufactured under strict quality control standards to ensure consistency, safety, and performance. Long-term, stable supply capacity to meet both small and bulk orders.

We offer flexible packaging solutions, private label support, and customized sizes to match your branding and market preferences.

With over 11 years of experience in international trade, we provide smooth communication, fast response, and complete export documents to help you receive goods efficiently.

Trusted by clients from Europe, Southeast Asia, the Middle East, and South America — our growing media have been well received in various markets for horticulture, hydroponics, and greenhouse production.