I grow Pagan Purples, which is one of the New Zealand types. It gets a bit of afternoon shade and I stake it with 6 foot bamboo poles. Every flowering stem gets its own stake, and I use the Velcro strips...a lot of them. Otherwise, any rain or wind topples them over. Mine get to at least 6 feet, some to 7 or more. I don't fertilize or anything. The clump gets larger every year and is now rivaling the size of the burning bush next to it. I have tried at least 4 other varieties, none of which did well for me. But this one seems to be quite vigorous.
Getting back to location, I think you would be fine if you can just temper the hottest afternoon sun a bit. And even if it is a shorter variety, the stems should be staked. They are hollow and very brittle.
