Poinsettia

Hello Forum.

Just so there's no confusion the above link is a photo and I'm in Brisbane Aus.

I was wondering if someone could help me with the basics of planting poinsettias, I already have one in my front yard and wanted to plant 2 more.

My questions are....

1...when is the best time to plant them?
2...what is the best method?, do I make a cutting?
3..if I use a cutting, do I place it in water and allow roots to grow?, do I need to add any soil to the water?

Thanks for any help.

Kabana.