Grodan PRO Delta 4 - 3 in Small Unwrapped Humidity Control Bringing together 4 highly effective

Bringing together 4 highly effective endo mycorrhizal species with 11 super aggressive bacteria strains

Mother Earth® Coco + Perlite creates the perfect growing environment

Easily installs in minutes

professionally formulated

The Uvonair® CD-1000 ozone generator will treat all odors being exhausted by a 10 in (25 cm) ventilation system under most circumstances

Grodan PRO Delta 4 - 3 in Small Unwrapped Humidity Control Bringing together 4 highly effectiveGro 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.