Since its establishment in 2011, UPuper® has been producing and providing the most cost-effective rock wool matrix, including Growing Cubes,Rockwool cubes,Seedling plug,grow block,Grow Plug,propagation plug, for the past decade, providing customers with various environmentally sustainable products. Our company has passed certifications such as SGS, CE, Australian heavy metal standard test.

UPuper® is gradually carrying out the "recycling" plan - recycling the used rock wool into new products, and continue to play an important role in building energy conservation, industrial thermal insulation and ship safety.The company also set up rock wool substrates R & D center that cooperates with domestic universities and institutions and large experiment base, and is equipped with professional experimental greenhouse and scientific researchers.

 Please note: The above table data is for reference only. For specific information, please contact us.



UPuper® Rock wool does not carry, absorb or consume any water or nutrients. Meanwhile, rockwool stone wool hydroponics grow starter cubes does not prevent crops from absorbing nutrients. The elements given by water and fertilizer can be totally provided to plants. Growers do not need to consider the various effects of the substrates itself on crops.
People can accurately mix the nutrition solution required by crops in each growing stage. It is conducive to the data collection, analysis and management to optimize planting strategies. UPuper® rock wool’s EC and pH values are stable, which is convenient to set a unified irrigation scheme to have an easier management, and keep the consistent growth of crop roots.

Instructions for using rockwool cubes:
1. Soak the rockwool cubes in warm water to fully foam.
2. Put the rockwool cubes into a container and distribute evenly.
3. Place the seeds gently on the surface in the correct direction and wrap them in rockwool cubes, as the frosted rockwool  grow cubes can absorb enough water to ensure sufficient moisture coverage of the plant roots.
4. Depending on the variety of plants, they can grow new roots under the support of external plant sprouting cloths, achieving germination.
5. Put the sprouted cloth blocks of plants back into the container and replenish them with water in a timely manner.


Uniform water content and electrical conductivity distribution throughout cubes.
Grooves can facilitate water drainage and provide air pruning on root system.
Rapid root system development.

rockwool stone wool hydroponics grow starter cubes---FAQs Guide

1.As a rockwool stone wool hydroponics grow starter cubes manufacturer, How to ship the goods to the customer?
2.How do you prevent the formation of algae or mold on the surface of rockwool stone wool hydroponics grow starter cubes?
3.About rockwool stone wool hydroponics grow starter cubes,What is the minimum purchase?
4.What are the key considerations for matching the size of rockwool stone wool hydroponics grow starter cubes to the specific plant species being cultivated?
5.How do you monitor and maintain proper moisture levels within rockwool stone wool hydroponics grow starter cubes throughout the plant's growth cycle?
6.What environmental conditions, such as temperature and humidity, are optimal for using rockwool stone wool hydroponics grow starter cubes in indoor or outdoor growing setups?
7.Do rockwool stone wool hydroponics grow starter cubes have different densities or compositions for use in various growing stages, such as seed germination or flowering?
8.About rockwool stone wool hydroponics grow starter cubes,How to calculate the irrigation amount of nutrient solution?
9.What is the expected lifespan of rockwool stone wool hydroponics grow starter cubes, and how do you determine when it's time to replace them?

1.As a rockwool stone wool hydroponics grow starter cubes manufacturer, How to ship the goods to the customer?

DHL , USP , FedEx , EMS , by air , by sea , and customer's forwarder are also acceptable.

2.How do you prevent the formation of algae or mold on the surface of rockwool stone wool hydroponics grow starter cubes?

To avoid causing losses due to these issues, UPuper recommends that you do the following:
1. Make sure to keep the rockwool grow cubes in a well-ventilated area.
2. Avoid overwatering the rockwool grow cubes.
3. Clean the rockwool grow cubes regularly with a mild detergent and water solution.
4. Use a fungicide or algaecide to prevent the formation of algae or mold.
5. Make sure to keep the rockwool grow cubes away from direct sunlight.

3.About rockwool stone wool hydroponics grow starter cubes,What is the minimum purchase?

The MOQ is one carton.

4.What are the key considerations for matching the size of rockwool stone wool hydroponics grow starter cubes to the specific plant species being cultivated?

As a rockwool stone wool hydroponics grow starter cubes manufacturer, UPUPER will tell you the following factors:
1. Plant size: The size of the rockwool cubes should be matched to the size of the plant. For example, larger plants will require larger cubes, while smaller plants will require smaller cubes.
2. Plant root system: The size of the rockwool cubes should also be matched to the size and complexity of the plant’s root system. For example, plants with larger and more complex root systems will require larger cubes.
3. Plant growth rate: The size of the rockwool cubes should also be matched to the plant’s growth rate. For example, plants with faster growth rates will require larger cubes.
4. Plant nutrient requirements: The size of the rockwool cubes should also be matched to the plant’s nutrient requirements. For example, plants with higher nutrient requirements will require larger cubes.
5. Plant water requirements: The size of the rockwool cubes should also be matched to the plant’s water requirements. For example, plants with higher water requirements will require larger cubes.

5.How do you monitor and maintain proper moisture levels within rockwool stone wool hydroponics grow starter cubes throughout the plant's growth cycle?

UPuper has many years of experience in this industry and can share with you these:
1. Monitor the moisture levels of the rockwool cubes regularly. Use a moisture meter to measure the moisture content of the cubes.
2. Adjust the watering schedule accordingly. If the cubes are too dry, water more frequently. If the cubes are too wet, water less frequently.
3. Use a humidity dome or tray to help maintain proper moisture levels.
4. Consider using a hydroponic system to provide a more consistent moisture level.
5. Add a layer of perlite or vermiculite to the top of the rockwool cubes to help retain moisture.
6. Consider using a fan to help circulate air and reduce humidity.

6.What environmental conditions, such as temperature and humidity, are optimal for using rockwool stone wool hydroponics grow starter cubes in indoor or outdoor growing setups?

The optimal environmental conditions for using rockwool grow cubes in indoor or outdoor growing setups are temperatures between 65-75°F (18-24°C) and humidity levels between 40-60%. It is important to maintain these conditions to ensure the best results for your plants.

7.Do rockwool stone wool hydroponics grow starter cubes have different densities or compositions for use in various growing stages, such as seed germination or flowering?

Yes, rockwool stone wool hydroponics grow starter cubes can have different densities and compositions for use in various growing stages. For example, some rockwool cubes are designed specifically for seed germination, while others are designed for flowering. The density and composition of the rockwool cubes can vary depending on the type of plant being grown and the desired outcome.

8.About rockwool stone wool hydroponics grow starter cubes,How to calculate the irrigation amount of nutrient solution?

In case of tomatoes, from planting to flowering: the irrigation amount is about 300-500ml / plant / day; From flowering stage to early fruiting stage: the irrigation amount is about 800-1200ml / plant / day; From early fruiting to harvest period: the irrigation amount is 1200-1500ml / plant / day, and the irrigation amount in full fruit period is about 1500-2000ml / plant / day. You can also bring out a rough calculation according to the shape and size of rock wool.

9.What is the expected lifespan of rockwool stone wool hydroponics grow starter cubes, and how do you determine when it's time to replace them?

The expected lifespan of rockwool stone wool hydroponics grow starter cubes is typically between 1-3 years, depending on the frequency of use and the quality of the cubes. To determine when it's time to replace them, look for signs of wear and tear such as discoloration, cracking, or crumbling. If the cubes are no longer providing adequate support for the roots of your plants, it's time to replace them.

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