About Rockwool

Rockwool (also known as mineral wool or stone wool) is used as a substrate growing medium for fruits, vegetables, and herbs in seeding, rooting, and hydroponic systems. 

There are several reasons why rockwool cubes and rockwool slabs are becoming viable options for growers: they’re affordable and efficient. Rockwool is excellent for plant growth as it provides a structure for the plant’s root zone while retaining moisture to help the roots uptake nutrients. It has excellent oxygen retention, does not obstruct root growth, is chemically inert, and comes in a range of sizes and shapes. These advantages contribute to its appeal among growers, as it can accommodate practically any plant.

Commercial hydroponics growers, particularly those using drip watering systems, rely on rockwool as a primary growing medium. 

rockwool cubes

What Is Rockwool?

Rockwool was invented in Denmark in the 1970s for gardening. It comes from melting basaltic rock and spinning it into fine fibers to produce a wool-like substance. It is then shaped into cubes, slabs, and blocks ideal for different gardening and growing systems.

Rockwool is widely used in hydroponics because it is pH-neutral. The air-pockets generated during its manufacturing make it perfect for holding oxygen and moisture, which are two essential elements in the root zone of plants. It’s also strong enough to support the plant’s root system, making it an excellent seed starter.

Advantages of Rockwool Growing

It’s Sterile

Rockwool for plants is sterile since it is a human-made product that contains no weed seeds, disease pathogens, or pests. A balanced and comprehensive hydroponic solution is required to address the nutritional needs of plants growing in rockwool.

It’s Safe

Rockwool is safe because it is made of natural materials and contains no dangerous chemicals. It’s perfectly safe to use as a rooting medium and plant substrate. However, humans should exercise the necessary protection when dealing with rockwool, as it can irritate the skin, eyes, and lungs because of its physical qualities.

It Retains Water

Rockwool drains excess water quickly due to its physical structure. Despite this, it maintains a small amount of water near the cube’s bottom. This unique characteristic allows plants to get enough water while also enabling more air to flow and oxygenate the roots. 

Why Choose Rockwool?

Many large hydroponic farms use rockwool as their substrate of choice. Growing in rockwool gives your plants the advantage of superior root zone technology, whether you’re playing with lettuce in a hydroponic jar or putting up a more extensive system.

Benefits of Rockwool Cubes

Because of their favorable structure, rockwool cubes are popular among hydroponics and conventional gardeners alike. When the fibers are spun together, they form an ideal structure for retaining water while also holding more oxygen than traditional soil media. Rockwool’s enhanced water holding capacity and oxygenation inside the root zone are pretty helpful for seed starting and propagating.

Rockwool, a common hydroponic medium, has a cation-exchange capacity (CEC) of zero, which means it has no negative charge to form bonds with positively charged fertilizers. This allows for extreme nutrient delivery optimization while leaving minimal room for error.

Rockwool cubes are available in a variety of sizes. Growers use the larger cubes to produce more compact plants, while the smaller ones are good for beginning seeds and propagating stem and leaf cuttings.

Are You Looking for a New Growing Medium?

Green Diamond Stonewool was created by a small group of hydroponic growers who were passionate about maximizing the capabilities of rockwool. With drive, diligent research, and a commitment to excellence, Green Diamond Stonewool was established. Our goal is to offer affordable, cutting-edge rockwool cubes & slabs to the hydroponic industry.

Green Diamond Stonewool rockwool products are designed to create healthier root systems and larger yields. Our rockwool cubes have the perfect amount of air pockets and encourage vigorous, multidirectional root growth throughout.

Try Green Diamond Stonewool’s hydroponic rockwool cubes today and experience the difference. For more information about our rockwool products, give us a call at (888) 980-WOOL or visit our contact page.