Hydroponic Rock Wool 25×25×25mm 30×30×40mm 40×40×40mm Rock Wool Cubes for Seeding Nursery
| Description | Hydroponic Rock Wool |
| Raw materials | natural basalt rock |
| Size | 25*25*25，25*25*40，30*30*40mm, or customized |
| Application | NFT system,DWC system,dutch bucket system,seedling trays |
| MOQ: | >6400cubes (6400cubes/carton) |
Product Description
Product Features：
Hydroponic Rock Wool Cubes for Seeding Nursery are an ideal growing medium for germination, seedling propagation, and plant rooting in hydroponic and soil-less cultivation systems. Made from 100% natural basalt rock.
Made from high-quality basalt rock through a high-temperature spinning process, these rock wool cubes provide excellent water retention, air porosity, and root support—ensuring strong, healthy seedling growth.
Our hydroponic rock wool comes in multiple sizes to meet different planting needs:
25×25×25mm – ideal for seed starting and small nursery trays
30×30×40mm – perfect for growing young seedlings before transplanting
40×40×40mm – suitable for larger seedlings and stronger root development
Each cube maintains a stable pH, offers excellent aeration, and is free from pests, weeds, and pathogens, making it a clean and reliable choice for both commercial and home hydroponic growers.
Whether you are cultivating lettuce, herbs, tomatoes, strawberries, or microgreens, these rock wool cubes help create an optimal root environment, promoting fast and uniform germination.
They are compatible with NFT systems, Dutch bucket systems, ebb and flow systems, and vertical hydroponic farms.
🌾 Key Features
Made from natural basalt rock, environmentally friendly and durable
Excellent water absorption and air exchange, promoting strong roots
Uniform density ensures consistent growth and nutrient distribution
Suitable for hydroponic, aquaponic, and soil-less seedling nurseries
Pre-cut and easy to handle for efficient planting and transplanting
Sterile, pH-stabilized, and reusable after proper cleaning
🌼 Applications
Hydroponic seedling nursery systems
Greenhouse and indoor farming
Vegetable, herb, and flower propagation
Vertical farms and commercial growing projects
💧 How to Use
Soak the rock wool cubes in pH-adjusted water or nutrient solution for 10–15 minutes.
Place seeds or cuttings into the pre-made holes.
Maintain moisture—keep the cubes moist but not waterlogged.
Once roots emerge, transplant the cubes into larger blocks or hydroponic systems.
Data Sheet:
| Description | Hydroponic Rock Wool |
| Raw materials | natural basalt rock |
| Size | 25*25*25，25*25*40，30*30*40mm, or customized |
| Application | NFT system,DWC system,dutch bucket system,seedling trays |
| MOQ: | >6400cubes (6400cubes/carton) |
Details:
FAQ – Hydroponic & Agriculture Solutions：
1. Who are we?
We are located in Guangdong, China, established in 2017, serving both domestic and international markets:
Domestic market: 30%
North America: 20%
South America: 20%
Southeast Asia: 10%
Middle East: 10%
Eastern Europe: 3%
Western Europe: 3%
Northern Europe: 3%
Southern Europe: 0%
2. Are you a factory or trading company?
We are the source manufacturer with our own factory and can provide complete hydroponic and agriculture solutions.
3. How can we guarantee the quality?
Always provide a pre-production sample before mass production.
Always carry out final inspection before shipment.
4. What can you buy from us?
Hydroponic Systems:
Vertical Tower System
NFT Hydroponic System
Substrate Gutter System
Microgreen Rack System
EBB&Flow Table System
Dutch Buckets Hydroponic
Agriculture Equipment & Irrigation Systems
Hydroponic Solutions:
Greenhouse Project
Indoor Vertical Farming Project
5. What services can we provide?
Delivery Terms: FOB, CFR, CIF, EXW, FAS, CIP, FCA, DEQ, DDP, DDU, Express Delivery, DAF
Payment Currencies: USD, EUR, CAD, RMB
Payment Methods: Wire Transfer, Letter of Credit, Credit Card, Western Union, Cash, Escrow
Languages Supported: English, Chinese, French, Russian
6. What is hydroponic rock wool made of?
Rock wool is made from natural basalt rock melted at high temperatures and spun into fine fibers. It’s an inert and sterile material perfect for hydroponic growing.
7.Why is rock wool good for hydroponic seedlings?
Because it has high porosity and excellent water-holding capacity, allowing both air and moisture to reach the roots easily — which promotes faster germination and stronger root systems.
8. Do I need to soak rock wool before using it?
Yes. Before planting, soak the cubes in pH-adjusted water (around 5.5–6.0) for about 10–15 minutes to stabilize pH and ensure even moisture.
9. Can rock wool be reused?
Yes, it can be reused after thorough cleaning and sterilization (using boiling water or hydrogen peroxide solution). However, for sensitive crops, new cubes are recommended.
10.Is rock wool safe and eco-friendly?
Absolutely. It’s made from natural basalt rock and contains no harmful chemicals. It’s inert, non-toxic, and safe for both people and plants.
11.What sizes of rock wool cubes are available?
We offer 25×25×25 mm, 30×30×40 mm, and 40×40×40 mm cubes — suitable for different growth stages from seed germination to transplanting.
12.Which plants can grow in rock wool?
Almost any hydroponic crop — including lettuce, herbs, tomatoes, peppers, cucumbers, strawberries, and microgreens — can thrive in rock wool cubes.
13.How should I store unused rock wool cubes?
Keep them in a dry, cool, and clean area, away from direct sunlight and moisture to maintain sterility.
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