RedRock Grow Block PRO, 6" x 6" x 5.3" (Case of 48) Cleanroom Supplies providing good oxygen levels around

providing good oxygen levels around the root

which have large critical diameters

1 mS/cm) – Suitable for sensitive young plants

Use with any type of seeds

RedRock Grow Block PRO, 6" x 6" x 5.3" (Case of 48) Cleanroom Supplies providing good oxygen levels aroundRedRock Grow Block PRO, 6" x 6" x 5. 3" (Case of 48) Dimensions: 42 40 Hole 15x15x13. 5cm Commercial grade stone wool pro starter blocks sourced and manufactured in North America. Our Stone wool is made in the USA Wetting agent ensures nutrients are immediately plant available The high fiber density of the stone wool starter blocks makes better use of water and fertilizers while allowing dry back Our stone wool starter blocks are priced for commercial