Grodan Delta 6.5 4x4x2.5 216 Per Case

Gro-Blocks function like plant containers. If you need a 3-inch pot, opt for a 3-inch Gro-Block. Larger Gro-Blocks can support the full growth of small plants. The holes are perfectly sized for any 1.5-inch starter plug. They come in packs with detailed instructions. Big Mama is Grodan's largest block, capable of supporting a large plant throughout its entire life cycle, containing more than twice the wool of our Hugo Block.