i tried planting the seeds directly in to rock wool but nothing happened, then i used two plastic flower pot bases one on top of the other as a lid and i placed paper towels two sheets folded up in the bottom plate thing and then i wet it with ph 5.5 water and then put my seeds in, then i place another folded paper towel, two sheets on top and i soak the whole lot, creating a paper towel seed sandwich effect and then i put the other flower pot base "the reservoir thing that you place unter a potted plant" on top and then place the whole thing on my router where its nice and warm and in 24hrs the tap roots have emerged up to 15 mm long so that worked very well for me ................
good luck