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How to Use
1. Please cut the rock wool into cubes according to your own needs with a knife before soaking.
2. Please simply soak the rockwool cube briefly (10 sec) in a nutrient solution to adjust its EC value and pH value. Don't squeeze it!
3. Use pH paper to make sure that its pH is in the desired range for your seeds. The optimum pH for most plant seeds is around 5.5.
4. Control the suitable moisture, illumination and temperature to improve the germination rate of seeds.
5. When the robust roots penetrate through the rock wool about 0.5-1 inches, transplant it into a suitable container.
Warm Tips:
The rock wool cubes are formed by compression of transverse wire and the stratification is normal. When cutting, please use a wallpaper knife or scissors. In the process of use, please make sure that it is completely cut.
Specifications:
Material: High quality basalt
Size: 1.0 inches/ 1.2 inches/ 1.5 inches/ 2 inches
Features：Light & Porous; Every piece can be divided into an independent growth medium.
Applications: Hydroponics, seed starting, rooting, plant propagation, cloning systems
Tips:
For people who are prone to allergy, it is recommended to wear gloves and goggles when using this product.
Grow seedling is also related to greenhouse equipment and temperature control.
christopher s. little
Reviewed in the United States on March 1, 2025
Great for sead germination
Brenda Green
Reviewed in the United States on February 4, 2025
Easy to work with
Customer
Reviewed in the United States on February 10, 2025
I bought these for my aquaponics lab and they are a great medium to work with. Def recommend wearing gloves when handling because otherwise the material can get in your skin and be irritating.
Morgan
Reviewed in the United States on January 22, 2025
I decided to try the rockwool cubes for my hydroponic system, but they were a letdown from the start. The cubes were far too brittle and broke apart as I tried to use them, making the setup process frustrating. The plugs didn’t hold seedlings well and kept collapsing, which hindered germination. After just a few days, I noticed that the cubes weren’t retaining moisture as expected, leaving my plants struggling to get enough water. The product seemed to be of poor quality compared to other rockwool cubes I’ve used in the past, with a flimsy texture that didn’t hold up under normal use. Moreover, there was an unpleasant chemical smell when I soaked them, which was concerning for the health of my plants. The package was also poorly sealed, and some of the cubes were already damaged before I even opened it. I wouldn’t recommend this to anyone serious about hydroponics—it’s a waste of money and time.
jim
Reviewed in the United States on June 22, 2024
I guess they work I wasn’t too happy with it. They were a bit small, but those are the ones I ordered the problem was you can’t break them apart they rip in all different spots. No I won’t be purchasing these again.
Patricia
Reviewed in the United States on December 17, 2024
Perfect size, easy to use, stays moist and good quality.
Ray Boone
Reviewed in the United States on December 13, 2024
The media could not be loaded.
T-Rex Wes
Reviewed in the United States on April 26, 2023
This works good. Holds moisture good. Only issue I have is that it falls apart too easy when cutting it into individual pieces. Even with a sharp razor.
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