Grodan Delta 10 - 4 in Block 4 in x 4 in x 4 in w/ Hole Water Pumps Aeration & Irrigation Achieve thicker and more rigid

Achieve thicker and more rigid plant cell walls for sturdier plants

Each kit includes all needed components and instructions for use

phosphorus and potash (N

Made from a base of the best organic dairy cow manure in the country

The only lighting controllers featuring industrial-grade ballast-rated relays

Grodan Delta 10 - 4 in Block 4 in x 4 in x 4 in w/ Hole Water Pumps Aeration & Irrigation Achieve thicker and more rigidGro 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.