Hugo Rockwool Block (36mm hole) are used to transplant your rooted cuttings or seeds into with the idea being to either grow your babies to a suitable size before moving them in to your hydroponic system alternatively given their larger size you can use the Grodan Hugo block as a standalone growing medium for smaller sized plants. These rockwool blocks have a 36mm hole to fit 36mm rockwool propagation cubes, Jiffy plugs and fleximix plugs.
Before using rockwool growing medium always pre-soak it for 24hrs in a weak nutrient solution (1 to 1.2 EC) with a pH of 5.2 to 5.5 and add a dose of Canna Rhizotonic if your budget allows. The pre soaking is important as rockwool has a high pH so by soaking it in a lower than normal pH it will stabilize around the 5.8 to 6.2 level you want for hydroponics growing.
|Size||(15cm x 15cm x 15cm) - 48x (15cm x 15cm x 15cm)|