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Internal RF shielding
10 ppm (700 ppm) and 1ºC/1ºF
A metallic finish protects the steel poles from long term wear and tear while presenting a clean aesthetic
Just assemble and add your favorite starting mix
and transplant
Grodan Gro Block Improved GR10 Large 4" w/Hole 4" x 4" x 4" Strip - Wrapped (Case of 24 Sleeves) Jumbo Jr Internal RF shieldingGrodan partnered with the Wageningen University and Research facility in The Netherlands and top growers throughout North America to identify the optimal stone wool substrate and irrigation strategies for specialty crops. The result of months of scientific research and trials is Grodan Gro Blocks Improved with Grodans Advanced Wetting Agent. These leading edge blocks have the optimal fiber structure and physical properties for crop uniformity, more