Description
- RedRock rockwool grow blocks are made in the USA
- RedRock rockwool grow blocks PRO are priced for commercial agriculture production
- Rockwool 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 42/40 Hole
- Each order comes with a Twin Canaries Chart
4 Inch Redrock Rockwool PRO Grow Block for Hydroponics | 6 Pack + Twin Canaries Chart
