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Stone wool block from the Grodan Improved range.
The Grodan Improved Gro-Block GRI80 Big Mama is an extra-large professional stone wool growing block measuring 200 x 200 x 200 mm, supplied without a pre-cut planting hole. With a substrate volume of approximately 8 litres, this block provides exceptional rooting space for vigorous plants and extended growing cycles.
The Grodan Improved product line combines an optimised fibre structure with Advanced Wetting Agent technology. This ensures more uniform water distribution throughout the entire block height, improved re-wetting performance and more stable water content (WC) and electrical conductivity (EC) behaviour.
Thanks to its generous substrate volume and improved root-zone environment, plants can develop extensive root systems. Uniform water distribution supports efficient utilisation of the growing medium while giving professional growers precise control over irrigation and nutrient availability.
Big Mama is designed for individual plants in professional hydroponic cultivation and controlled growing systems. The properties of Improved stone wool support both vegetative and generative crop steering strategies.
The version without a pre-cut planting hole offers flexibility for placing an already rooted propagation block on top or creating a suitable planting opening.
