UPuper® is a company specializing in the manufacturing and export of rock wool substrates for agricultural cultivation. Our goal is to provide high-quality products that are environmentally and human friendly, and affordable for our customers. Our company was established in 2011 with a registered capital of 100 million US dollars. It is the largest green rock wool production base with the highest investment and leading technological equipment in the entire Asia Pacific region.

We mainly produce grow block,propagation block,Rockwool cubes,propagation plug,Growing Cubes,Seedling plug and others. We are committed to providing pollution-free, high-performance, sustainable, and safe substrates for agricultural facilities. Nowadays, we have made a lot of contributions to the digitalization,large-scaling,precision,intellectualization of agricultural facilities.

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



growing seedlings in rockwool cubes has the least impact on the environment among all substrates. UPuper® rock wool cubes are made from natural rock and melted at 1500℃. It has no pathogenic bacteria, toxic and harmful substances.
It provides a pollution-free root environment for growing green crops. UPuper® Rock wool substrates can also realize recycling, which makes it to become a green, safe, stable and reliable soilless culture medium.

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.


Individually wrapped cubes hold the rockwool’s shape and prevent algae growth.
Easy to transport without hurting the roots and can improve transplanting efficiency.

growing seedlings in rockwool cubes---FAQs Guide

1.As a growing seedlings in rockwool cubes manufacturer,What's the term of payment?
2.Do growing seedlings in rockwool cubes require any specific pH and nutrient management practices for optimal plant growth?
3.About growing seedlings in rockwool cubes,How to calculate the irrigation amount of nutrient solution?
4.Are there organic or sustainable options for growing seedlings in rockwool cubes that meet eco-friendly growing practices?
5.As a growing seedlings in rockwool cubes manufacturer, What about your package?
6.Can growing seedlings in rockwool cubes be reused, and what is the recommended cleaning and sterilization process for multiple growing cycles?
7.Are there any concerns or precautions related to the health and safety of growers working with growing seedlings in rockwool cubes, including dust or fiber exposure?
8.As a growing seedlings in rockwool cubes manufacturer,What is soilless cultivation?
9.Are growing seedlings in rockwool cubes compatible with automatic irrigation and nutrient delivery systems commonly used in hydroponics?
10.What are the disposal and recycling options for used growing seedlings in rockwool cubes, and are they environmentally responsible?
11.How do you prevent the formation of algae or mold on the surface of growing seedlings in rockwool cubes?
12.Can growing seedlings in rockwool cubes be used in combination with alternative growing methods like aeroponics or deep water culture (DWC)?
13.What is the composition and material of growing seedlings in rockwool cubes, and how do they compare to other growing mediums like soil or coco coir?
14.About growing seedlings in rockwool cubes,Should I water from the top or root of the plant?
15.Are there rockwool grow cube products specifically designed for vertical gardening or living walls?

1.As a growing seedlings in rockwool cubes manufacturer,What's the term of payment?

T/T, Paypal, Credit card etc.

2.Do growing seedlings in rockwool cubes require any specific pH and nutrient management practices for optimal plant growth?

Yes, growing seedlings in rockwool cubes require specific pH and nutrient management practices for optimal plant growth. The ideal pH range for rockwool is between 5.5 and 6.5. Nutrient management should include regular monitoring of the nutrient solution and adjusting the levels as needed. Additionally, it is important to flush the rockwool with fresh water every few weeks to prevent nutrient buildup.

3.About growing seedlings in rockwool 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.

4.Are there organic or sustainable options for growing seedlings in rockwool cubes that meet eco-friendly growing practices?

Yes, there are several organic and sustainable options for rockwool grow cubes that meet eco-friendly growing practices. These include organic rockwool cubes made from natural materials such as coconut coir, hemp, and jute, as well as sustainable rockwool cubes made from recycled materials. Additionally, some companies offer rockwool cubes that are treated with natural, non-toxic solutions to reduce the risk of disease and pests.

5.As a growing seedlings in rockwool cubes manufacturer, What about your package?

Export standard package. Cartons tested for compressive strength. Pallet packaging is also acceptable.

6.Can growing seedlings in rockwool cubes be reused, and what is the recommended cleaning and sterilization process for multiple growing cycles?

Yes, growing seedlings in rockwool cubes can be reused. The recommended cleaning and sterilization process for multiple growing cycles is to soak the cubes in a 10% bleach solution for 10 minutes, rinse them thoroughly with clean water, and then allow them to dry completely before reusing.

7.Are there any concerns or precautions related to the health and safety of growers working with growing seedlings in rockwool cubes, including dust or fiber exposure?

Yes, there are health and safety concerns related to working with rockwool grow cubes. Rockwool is made from melted basaltic rock and chalk, and when it is cut or handled, it can release dust and fibers into the air. This dust and fiber can be inhaled and can cause irritation to the eyes, nose, and throat.
It can also cause skin irritation and respiratory problems. Therefore, it is important to wear protective gear such as a dust mask, safety glasses, and gloves when handling rockwool. Additionally, it is important to ensure that the work area is well-ventilated and that the rockwool is kept away from food and drink.

8.As a growing seedlings in rockwool cubes manufacturer,What is soilless cultivation?

Soilless cultivation is a method of cultivating plants without natural soil nor use compound fertilizer and similar compound fertilizer based on soil. It is a new method that only uses nutrient solution to support for plant growth or various cultivation substrates that can replace soil and are suitable for plant growth. Soilless cultivation can be divided into fog cultivation, water cultivation and solid substrate cultivation. UPuper® Rock wool substrate belongs to solid substrate cultivation.

9.Are growing seedlings in rockwool cubes compatible with automatic irrigation and nutrient delivery systems commonly used in hydroponics?

Yes, growing seedlings in rockwool cubes are compatible with automatic irrigation and nutrient delivery systems commonly used in hydroponics. However, it is important to note that rockwool cubes should be soaked in water before use to ensure that they are properly hydrated. Additionally, rockwool cubes should be flushed with water every few weeks to prevent nutrient buildup.

10.What are the disposal and recycling options for used growing seedlings in rockwool cubes, and are they environmentally responsible?

growing seedlings in rockwool cubes are made from a combination of basalt and slag, which are both non-toxic and non-hazardous materials. The best way to dispose of used rockwool grow cubes is to recycle them. Many local recycling centers accept rockwool grow cubes for recycling. Alternatively, you can contact your local waste management company to see if they offer a special collection service for rockwool grow cubes.
Recycling rockwool grow cubes is an environmentally responsible option as it reduces the amount of waste that goes to landfills. Additionally, recycling rockwool grow cubes helps conserve resources and reduce the amount of energy needed to produce new materials.

11.How do you prevent the formation of algae or mold on the surface of growing seedlings in rockwool 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.

12.Can growing seedlings in rockwool cubes be used in combination with alternative growing methods like aeroponics or deep water culture (DWC)?

Yes, growing seedlings in rockwool cubes can be used in combination with alternative growing methods like aeroponics or deep water culture (DWC). Rockwool cubes are a great medium for starting seeds and cuttings, and can be used in combination with other growing methods to provide a stable environment for the roots to develop. Rockwool cubes can also be used to provide additional aeration and drainage for plants grown in aeroponics or DWC systems.

13.What is the composition and material of growing seedlings in rockwool cubes, and how do they compare to other growing mediums like soil or coco coir?

growing seedlings in rockwool cubes are made from a combination of basalt and chalk that is melted and spun into fibers. The fibers are then compressed into cubes. Rockwool is a great growing medium because it is sterile, lightweight, and provides excellent drainage and aeration. It also holds moisture well and is pH neutral. Compared to soil, rockwool is much lighter and easier to work with, and it does not contain any of the pests or diseases that can be found in soil. Compared to coco coir, rockwool is more sterile and does not contain any of the salts that can be found in coco coir. Rockwool is also more lightweight and easier to work with than coco coir.

14.About growing seedlings in rockwool cubes,Should I water from the top or root of the plant?

Seedling raise can use the tidal seedbed and the drip irrigation control system used after transplanting. Those processes are watered from below the plant and close to the root.

15.Are there rockwool grow cube products specifically designed for vertical gardening or living walls?

Yes, there are rockwool grow cubes specifically designed for vertical gardening and living walls. These cubes are designed to provide optimal air and water retention, as well as support for the plants. They are available in various sizes and shapes to fit any vertical gardening or living wall setup.

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