clear plastic cups or glasses are useful for individual cuttings, a translucent container the same size as the cloner can be placed on top as a humidity dome. I`ve cut the bottom out of tubs and hotglued greenhouse poly over the cut out which is another option.

Ant: Am a newbie at a lot, but did propagating of hydrangea cuttings this past early June, and after a long time, most of them had NO roots at all starting and noticed black at bottom of stems. Only about 12 of my cuttings did not have the black on stems, and had the tiniest hint of roots. The others were tossed. I am sure the black was root rot. I did not have proper drainage for those cuttings I lost. Stupid mistake. DUH.