Rockwool is produced from basalt rock, which is melted and then spun into thin fibres. These are mixed with a binding agent and compressed into slabs that are cut into the smaller cubes used for propagation. Fibres in Grodan have been spun in only one direction but Cultilene propagation cubes have fibres that have been spun in two directions. This gives the cubes great flexibility and great strength when theyâ€™re wet â€“ so they wonâ€™t go all soggy on you.
Seasoned hydroponics experts swear by Cultilene propagation cubes because of the support and good aeration propertiesÂ they provide for strong root growth. A healthy root system means a healthy plant and Cultilene propagation cubes can be used with even the most fragile cultures.
Two sizes are available:
Large - measures 36mm X 36mm X 40mm
Small - measures 25mm X 25mm X 40mm
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