Grodan Delta 5.6 Block 3 by 3 by 4 Inch with Hole Case of 256 Blocks

- Gro-Blocks are similar to a plant container. - 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.