Grodan Stonewool Delta Gro-Blocks & Big Mama Options:Grodan Pro Improved 10 Block, 4Inches x 4Inches x 4Inches, case of 144 (2 case min) • Provides a balanced foundation

• Provides a balanced foundation for maximized plant flowering

Roots grow within and below the collar

• Super compact

When the cloth junction becomes clogged and response time is sluggish

Grodan Stonewool Delta Gro-Blocks & Big Mama Options:Grodan Pro Improved 10 Block, 4Inches x 4Inches x 4Inches, case of 144 (2 case min) • Provides a balanced foundationGro 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.