I had this in the south for many years & took a few cuttings. One survived the winter in the garage, I took a cutting, then the parent died. The cutting (in a pot) was fine till it got too dry in the summer - the foliage keeled over. Most plants would just revive with water but it didn't; fortunately I took 3 cuttings before it completely expired.
I've planted one in a raised bed that gets sun for about 8 months of the year, I thought the garage for the other 2 over the winter.
What conditions do they like? I tried the RHS site but only get up the microcephela type, growing to .1 to .5 metre, ours was about 5 foot & can't find a reference to a taller one.
Thanks for any advice.