I've always had success sealing them damp in ziplock plastic bags. Every couple of days they'd get rinsed and sealed again. They were in good light, never in direct sun, and soon they'd develop lots of roots along the stems. Worked really well with a few of the different H. australis subspecies, H mac., H, lacunosa, H. pubicalyx and another NOID one. Bit slower with H. pottsii and H sussuela. Once the roots were well developed they were laid on a light potting mix in the pots and covered with plastic until the roots worked their way into the soil.
