i have just got my first propagator as the top of the boiler is a little insufficient for my needs now!! I have started some chillis in a compost/vermiculite mix, but upon reading the instructions of the propagator it says not to use vermiculite or similar, so i'm unsure whether to transfer the pots across from the boiler.
Anyone heard of this before, is it just over cautious safety instructions? and does anyone use it with no problems?