@blue fox yes, we can see the 7cm thick rock wool board is in the styro form box has drain holes and 2cm thick rock wool board in the plastic tray has drain holes.
We can slice the rock wool as we want to the thickness 2~15cm around.
@valleylynn I do not know the name of sedum yet. I am a beginner in sedum , only 20days before I try to propagate the sedum on the rock wool substrate, but in tomato or bell pepper horticulture I am 15 years expert .
@blue fox yes we can dig hole by ball pen or cutting by knife and insert the root of sempervivum
And can fasten it by the cutting wool In the rock wool and let it stand vertically ,
In vertical stand rock wool , water content on upper side is higher than bottom .
Please order to me any test , any examination in the rock wool , I will do it.
