Moon flower

Last summer I thought I had lost my moon flower.  It doesn't like the frosts in Christchurch and always dies back.  Previously it has self seeded.  As no seedlings appeared last year and I searched on the internet for someone selling them without success.  Then late this spring one tiny seedling appeared, it is now about half a metre high.  With five huge flowers about to open, I hope it will produce more seeds this year.  They are amazing to watch open, the spirals unfold fairly quickly to a bell/lily like flower.