I took a cutting from mine. I just snipped off about 3 inches after it had flowered, put it into a glass of water, left it until some soft white roots appeared, then put it in a pot. It is now about 2' high and my daughter has it. They're very easy to grow - I found one growing in a hole in a nearby brick which must have fallen in and rooted itself when I was pruning it. I pulled it up, put it in a pot and gave it away - it's also doing very well.