Grodan Crop Box Slabs (370x550x150 mm) 4/pk Set of 2 19mm (100pk)

19mm (100pk)

The issue of delayed initial growth in crops is frequently attributed to nitrogen deficiency

For superior results

Use: Last 5 days of flower period

Grodan Crop Box Slabs (370x550x150 mm) 4/pk Set of 2 19mm (100pk)Grodan Rockwool is a mineral wool made from molten basalt and limestone rock that is spun into cotton candy like fibres and then compressed into cubes, blocks or slabs. Being made from natural rock, Grodan is a mineral based product used in hydroponic growing applications. The WCB or Wrapped Crop Box Slab by GRODAN is designed to suit a 45litre crop box crate. They are called wrapped as they are supplied as individually plastic wrapped slabs and the