UPuper®, a professional production and export company, is a manufacturer that integrates design and production. The company is headquartered in Hongqiao CBD, Shanghai, and its production base is located in Dafeng District, Yancheng City, Jiangsu Province. It covers an area of over 233000 square meters and has a total investment of 100 million US dollars.

Our main production and export products are as follows: Grow Plug,Seedling plug,propagation plug,grow slab,propagation block,Growing Cubes, etc. Our products have a wide range of applications in various fields. The company has also established a research and development center for rock wool matrix in cooperation with domestic universities and large-scale experimental bases, equipped with professional experimental greenhouses and researchers, continuously promoting the development of new products in the field of rock wool matrix applications.

 Please note: This table is for reference only, please consult us for specific information.



polymer grow plugs 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.


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.

polymer grow plugs---FAQs Guide

1.Are polymer grow plugs pH-neutral, and do they require any adjustments before use?
2.Can polymer grow plugs be reused, and what is the recommended cleaning and sterilization process for multiple growing cycles?
3.About polymer grow plugs,Why should we open some drains on the rock wool cultivation strip?
4.Can polymer grow plugs be used in combination with alternative growing methods like aeroponics or deep water culture (DWC)?
5.Are there rockwool grow cube products specifically designed for vertical gardening or living walls?
6.Do polymer grow plugs have any insulating properties that benefit plant roots in extreme weather conditions?
7.What types of crops or plants are best suited for cultivation in polymer grow plugs, and are there any limitations?
8.What are rockwool grow cubes?
9.How do you monitor and maintain proper moisture levels within polymer grow plugs throughout the plant's growth cycle?
10.Can polymer grow plugs be used in combination with traditional soil to improve aeration and drainage in potted plants?
11.About polymer grow plugs,What is the minimum purchase?

1.Are polymer grow plugs pH-neutral, and do they require any adjustments before use?

polymer grow plugs are generally pH-neutral and do not require any adjustments before use. However, it is recommended to check the pH of the cubes before use to ensure they are at the desired level.

2.Can polymer grow plugs be reused, and what is the recommended cleaning and sterilization process for multiple growing cycles?

Yes, polymer grow plugs 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.

3.About polymer grow plugs,Why should we open some drains on the rock wool cultivation strip?

The drain is opened at the bottom of both ends of the cultivation strip. The drain is opened to allow the normal discharge of excess water and fertilizer to keep the EC Value in the planting strip stable. The location of drainage holes and the correct irrigation amount directly affect the distribution of water and EC in the cultivation strip. Be sure not to set additional drainage holes in the planting strip when you use them, otherwise it will change the planting strip drainage mode, which may be unfavorable to the plant roots in some areas in the planting strip. The surplus water and fertilizer will flow into the diversion tank and return to the irrigation system for recycling after disinfection and other process. It can not only solve the problem of water and fertilizer, but also protect the environment.

4.Can polymer grow plugs be used in combination with alternative growing methods like aeroponics or deep water culture (DWC)?

Yes, polymer grow plugs 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.

5.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.

6.Do polymer grow plugs have any insulating properties that benefit plant roots in extreme weather conditions?

Yes, polymer grow plugs do have insulating properties that can benefit plant roots in extreme weather conditions. The insulation helps to keep the root zone temperature more consistent, which can help protect the roots from extreme temperatures. Additionally, the insulation can help to retain moisture in the root zone, which can be beneficial in dry climates.

7.What types of crops or plants are best suited for cultivation in polymer grow plugs, and are there any limitations?

polymer grow plugs are best suited for hydroponic cultivation of vegetables, herbs, and flowers. Some of the most popular crops grown in rockwool cubes include tomatoes, peppers, cucumbers, lettuce, and basil. Rockwool cubes can also be used to propagate cuttings from existing plants.
The main limitation of rockwool cubes is that they are not suitable for growing root vegetables such as potatoes, carrots, and onions. Additionally, rockwool cubes are not suitable for growing plants that require a lot of water, such as watermelons and pumpkins.

8.What are rockwool grow cubes?

Rockwool grow cubes are a type of growing medium made from melted basalt rock and chalk that is spun into fibers and then compressed into cubes. They are commonly used in hydroponic systems and are known for their excellent water retention and air porosity. Rockwool cubes are also pH neutral, making them ideal for growing a variety of plants.

9.How do you monitor and maintain proper moisture levels within polymer grow plugs 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.

10.Can polymer grow plugs be used in combination with traditional soil to improve aeration and drainage in potted plants?

Yes, polymer grow plugs can be used in combination with traditional soil to improve aeration and drainage in potted plants. Rockwool is a lightweight, porous material that helps to improve drainage and aeration in soil, allowing for better root growth and healthier plants. It can also help to retain moisture in the soil, which is beneficial for plants that require more frequent watering.

11.About polymer grow plugs,What is the minimum purchase?

The MOQ is one carton.

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