Grodan Rockwool Blocks

The Grodan mini blocks offer the ideal starting point for seeds and cuttings. Made from rockwool, which is extracted from volcanic rock, these 4x4x4 cm blocks are 100% sterile.

Before use, the blocks must be placed in water (pH 5.5). Do not press out the blocks afterwards as this will damage the internal structure.

The base of each block is grooved for drainage.