Grodan propagation cube SBS (single block system) is the most popular propagation block on the hobby market and can be used with all the cubes listed above. It combines great crop growth for the best possible start. SBS blocks are supplied in a specially manufactured black tray which excludes light from the root zone and refills are available. These cubes are for use with the large hole Grodan blocks.
Large - 36/77 per tray.
This product was added to our catalog on Wednesday 22 October, 2008.