Grodan Improved Gro-Block Big Mama, 8 x 8 x 8, no hole, case of 18 highlifeblack The absence of the frame

The absence of the frame eliminates shadows in the beam

It was brought back into the mainstream from a spore print that was over 20 years old

Silicon dioxide (SiO₂) 38-46%

naturally—no respirators

Grodan Improved Gro-Block Big Mama, 8 x 8 x 8, no hole, case of 18 highlifeblack The absence of the frameProduct DetailsGrodan Improved Gro Blocks Leverage the benefits of products developed alongside plant scientists, that are specifically engineered to deliver real results for your crops. Grodan Gro Blocks Improved with Advanced Wetting Technology Grodan's improved stone wool substrate. Keep it Real Real Science Grodan partnered with the Wageningen University and Research facility in The Netherlands and top growers throughout North America to identify