All it took was a little pinching through the summer and some staking and water. I had one more in the backyard on a north side that got bushy but didn't flower. I planted it about 10 feet away from the other one in the front yard last week but it was kinda hot and I had to cut it back. We've had a hot autumn this year in SoCal. It was 90º today. I am so looking forward to cooler weather.
You may be able to find this plant in independent nurseries, you know the one you go to find something different. I got one at The Huntington Library & Gardens: The Huntington I love it and you might too :-)