Grodan Propagator Cubes
suitable for seed and cutting propagation. The SBS (single block system) is the most popular propagation block and compatible with all the Grodan cubes. It combines efficiency in terms of both crop growth and plant handling. SBS blocks are supplied in a specially manufactured black tray which excludes light from the root zone.
Propagator cubes come in two sizes:
25mm square cubes, supplied in trays of 150 (25x25x40mm)
36mm square cubes, supplied in trays of 77 (36x36x40mm)