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Rockwool

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Rockwool is an inert medium that has been a popular for years due to its ease of use and versatility. Rockwool is available in a variety of sizes from 1” cubes designed for propagation, to thick slabs capable of holding and supporting the root systems of large plants, to bags of loose fill mini cubes to fill pots and containers of any size.

Rockwool can be used as a growing medium from the time of propagation right through to harvest. Small rockwool cubes are generally used for the propagation of hydroponically grown plants. Seeds can be planted directly into the cubes. Once the plants reach the proper level of maturity, the cubes can be transplanted to larger cubes, slabs or containers. The roots of the plant can then grow down and into new rockwool. A standard rockwool slab is big enough to support three or four plants. Smaller cubes, chunks, and loose fibers from bales can be used as filler for buckets, pots, and net pots.

Explore Hydrobuilder’s variety of rockwool from our friends at Grodan/Pargo, Hydrofarm and Cultilene!