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At 454 Bags we only work with brands we trust. We believe Cultiwool to be at the top of the Rockwool game. If you have been using a different Rockwool, you should definitely run a side by side comparison and experience the upgrade to Cultiwool.

The Cultiwool substrate blocks are provided with drain grooves at the bottom to improve the water-flow under the block. This is especially useful when the substrate blocks are placed on grow tables and concrete floors. Another benefit of the drain grooves under the block is that it will limit the contact surface with the ground. This will avoid bringing diseases into the plant via weak roots often in combination with too high temperatures.

The 6x6x6 Cultiwool Blocks come with a donut ring – a water chamber around the plug hole to place irrigation drippers. With the donut ring you will achieve an even more homogeneous distribution of the water.