Cultiwool Rockwool Cube 10 x 10 x 6.5 cm

Cross grooves improve water drainage under the block, and the black/white film prevents algae growth.

Drainage grooves

Cultiwool growing blocks have drainage grooves on the bottom to improve water drainage under the block. This is especially useful when the blocks are placed on growing tables or concrete floors. Another advantage of grooved blocks is that they reduce the contact area with the ground, which helps prevent diseases from reaching the plants through weak roots, often in combination with high temperatures.