Rockwool 4" x 4" x 2.5" Block (216 Blocks/Case)

Cultiwools’ growing blocks are unique in the most efficient way. That has everything to do with the consistency of their products. Quick and easy uptake of water and the homogeneous distribution of water throughout the substrate are one of the most important features of a growing medium. The Cultiwool substrate blocks are provided with drain grooves at the bottom to improve the waterflow under the block. This is especially useful when the substrate blocks are placed on cultivation 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 deseases in to the plant via weak roots often in combination with too high temperatures.