Grodan Big Mama, 8" x 8" x 8", case of 18 cloning-and-seed-starting pH Down™ is safe to

pH Down™ is safe to handle and is suitable for use in organic food production

and uniform Grodan product

The purpose is to support the requirement of the plant in the different plant stages

Expands quickly up to 7 times when hydrated

Grodan Big Mama, 8" x 8" x 8", case of 18 cloning-and-seed-starting pH Down™ is safe toBIG MAMA is the largest block ever produced by Grodan. It is 8" square and contains over twice the amount of rockwool as the popular Hugo block. This block is big enough to grow a large plant for its entire life! When your plant outgrows its current block, just place it on top of Big Mama. BIG MAMA is solid rockwool and does not have a precut hole thus making it suitable to hold any size smaller block on top (even a Hugo).