Grodan AO 25 X 25 X 40 mm Rockwool Cubes - Case

Grodan AO Rockwool cubes

• 1" X 1" X 1.6" (25 X 25 X 40mm)
• Tapered to bottom (connected at top)
• 10 mm diameter X 10 mm deep seed hole
• 200 cubes per sheet
• Pollutant free
• Pathogen free
• Does not lock up nutrients
• Does not  release substances into water or nutrients
• Designed specifically for irrigation efficiency and uniformity
• Holds ideal ratio of water to air
  
• Case: 30 sheets - 6,000 cubes

Rockwool or stonewool is made by melting basalt rock and chalk, then spinning the molten rock into fibers that are compressed and cut into the various sheets, cubes, blocks, etc.

One cubic foot of rock makes 37 cubic feet of rockwool.

The World Heath Organization has classified stonewool as a safe-to-use bio-soluble product. 

Grodan Rockwool AO Cubes are suitable for starting a wide range of plants, from vegetable crops to flowers.

The cubes are attached in sheets that fit in a 10-20 tray, but are easily separated for transplanting.

Grodan AO cubes are attached at the top and taper toward the bottom.