Top 10 Best Rockwool Cubes 4 Inch

Stone wool grow blocks are made in the USA. RedRock Stonewool grow blocks PRO are priced for commercial agriculture production. Stone wool has high fiber density makes better use of water and fertilizers while allowing dry back. Each block measures 4-Inch x 4-Inch x 4-Inch with 4240 Hole. Comes with 6 4 Redrock Rockwool 4 PRO Starter Blocks and 1 Twin Canaries Chart.

Each Block is 4 x 4 x 4 with a hole at the top. Gro-block holes are the perfect size for any 1.5 Starter plug or macroplug. Plants can be fully grown in these gro-blocks. The bases of the gro-blocks are grooved to promote drainage and to avoid wet feet. Comes with Twin Canaries Liquid Volume Conversion Chart.

BAY HYDRO LLC Ships in 24 HOURS, Don't believe the Estimated Date, As we are SUPER FAST.

Each Block is 4 x 4 x 4 with a hole at the top. Gro-block holes are the perfect size for any 1.5 Starter plug or macroplug. Plants can be fully grown in these gro-blocks. The bases of the gro-blocks are grooved to promote drainage and to avoid wet feet. Comes with Twin Canaries Liquid Volume Conversion Chart.

Rockwool. Grodan. Grow medium. Soiless medium. Twin Canaries Chart Included..

BAY HYDRO LLC Ships in 24 HOURS, Don't believe the Estimated Date, As we are SUPER FAST.

An inorganic and sterile growing medium made from spun molten rock. A superior medium for rooting cuttings. Provides 20 air space when saturated. Does not contain nutrients. Condition by soaking for eight hours.