Grodan Delta 'Hugo' Rockwool Cube (Box of 48)
15x15x15cm (6")
(36mm inner hole)

The Hugo block is Grodan's answer to the pot, the volume of rockwool being sufficient for the plant to develop a substantial root system. Some growers are using these cubes instead of slabs and are getting fantastic results. They are great for deep Ebb and Flood tables, drip systems and for watering by hand.