Oh yeah I sorted the hibiscus propagation conundrum. Just thought I should mention that since I know how desprately worried you all were. The bulletproof method goes like this:
1/ Wait until late autumn.*
2/ Decide cut flowers are required for guests, and a hibiscus would look rather good with the day's cut flowers.
3/ Forget about cut flowers for a week until they start looking really ratty.
4/ Go to throw really ratty old flowers out.
5/ Notice that hibiscus has little white lumpy bits on it, which are root nodes FFS.
6, 7, 8 & 9/ Keep hibiscus cutting. Change water. Throw ratty bits out. Go get more cuttings.
*This advice is suitable for a sub-tropical climate, and is not guaranteed to work in the Arctic.
Devious, treacherous, murderous, neanderthal, sub-human of the West.