Made in Denmark since 1969, Grodan stonewool is known the world over for its quality, consistency, ease of use and performance. Seeds or cuttings are started in theseÂ large Grodan Gro-Blocks and, once rooted, the blocks are transferred to a larger stonewool slab. Gro-Blocks can also be planted directly into containers for soil gardening. This is a strip of six 4"x4"x4" Gro-Blocks, each with pre-formed holes.
Gro-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 Grodans 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.
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