Rockwool is a super-absorbent material that's perfect for use in hydroponic systems. The tightly packed bundles of man-made fibres do a fine job supporting roots, encouraging healthy and rapid growth. Rockwool blocks are commonly used as a starter medium or rooting medium and are compatible with most growing systems.
It is a great option for creating a root growing medium as it has excellent water retention, oxygen supply and air drainage properties. It can be used with most growing systems and is lightweight, removable and easy to clean if required.
At Growers House we recommend Cultilene's Cultiwool, it has a unique and innovative formulation that boosts root strength and provides excellent nutrient retention.