It struck me this morning.. am I doing immersed the hard way to get HC established as a carpet? Wouldn't it be easier to grow the HC emersed in a seed tray(s) on the windowsill and then cut and lay it like turf?
And if I did that.. couldn't I carve the contours from an inert media such as HD insulation board to avoid anaerobic conditions and have really deep and steep contours? and then embed the rockwork and lay the HC turf on top? Or have I missed something in my thoughts?