Tropical Hibiscus 'Rosalind'

Hi,
I bought one of this plant about a year back and have it grown in the ground. It flowers well and I would like to grow more o...Read Moref them. I was told that I can put a stem cutting in a small vase of water and it should sprout little roots in a few weeks. It don't seems to work in my case.

Can someone advise of an alternative method ? I live in Sydney, Australia and our autumn period is pretty warm and humid with temperatures around 25 celcius in the afternoon.

Kind regards
Ricky Tan

Strong lovely plant with a whole lot of constant blooming. Beautiful orange color. I've had both singles and doubles on this plant.