Grodan Stonewool Delta Gro-Blocks & Big Mama Options:Grodan Pro Improved 10 Block, 4Inches x 4Inches x 4Inches, case of 144 (2 case min) When the cloth junction becomes

When the cloth junction becomes clogged and response time is sluggish

animals and our environment

Lids are sold separately

Roots grow within and below the collar

Grodan Stonewool Delta Gro-Blocks & Big Mama Options:Grodan Pro Improved 10 Block, 4Inches x 4Inches x 4Inches, case of 144 (2 case min) When the cloth junction becomesGro Blocks are similar to a plant container. Need a 3 in pot? Then choose a 3 in Gro Block. Small plants can be fully grown in our larger Gro Blocks. Holes are perfect size for any 1. 5 in starter plug. Come in packs labeled with instructions. Big Mama is Grodan's largest block ever produced! Big enough to grow a large plant for its entire life. More than twice the amount of wool as our Hugo Block.