Grodan Rockwool Gro-Block - Wrapped 4x4x4 clone 000 lumens and provides the

000 lumens and provides the output and ideal color spectrum required for successful indoor gardening

4 centimeters)

increase yield

Seedling stage: Maintaining CO2 levels between 600-1200 PPM can increase root growth and plant development

Grodan Rockwool Gro-Block - Wrapped 4x4x4 clone 000 lumens and provides theYou know its time to transplant to the Gro Block when roots coming out of the starter are about 1 long. Just place your Mini Block on top of the 3 or 4 block without the hole, or your Macroplug A OK into the 3 or 4 block with the hole and watch your plant flourish. Detailed description: Gro Blocks : Delta 6. 5 Small 4" Sizes in inches : 4x4x4 Hole sizes available : Big hole Blocks Package : 6 Blocks Case : 144