Growers rely on Grodan Rockwool Cubes Large Hole and slabs. They are the world’s leading rockwool makers. They have been developing rockwool products since the 1960’s, for growers in over 60 countries.
Sterile and inert – ideal hydroponic medium. Reduced risk of pests and disease.
Even root growth – mostly vertical fibre means identical levels of resistance for each root, so roots grow evenly.
Increased root growth – Designed for great air / water balance and faster rooting.
Uniformity – quality and structure is uniform, so water content and EC (CF) will be the same for every plant.
Re wetting – Grodan rockwool is easy to re wet if it dries out, reducing the risk of root damage.
Remove the plastic sleeve before moving into a hydro system. Resulting in increased oxygen to the root zone and faster growth. Rock wool has many advantages for hydroponic growing.
High quality rock wool brands, being a manufactured product are also consistent in quality. They don’t decompose or break down over time in the way that many other natural growing substrates do.
A little hard on your pH levels, so soak in adjusted water (PH 4.5 - 5.0) before use.
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