Here's how our national flower and similar cultivars are grown.
This cluster is found at our botanical gardens.
They will mostly only flower above the stake/support.
---------- Post added at 09:32 AM ---------- Previous post was at 09:27 AM ----------
Here's another mature plant housed under netting in an organic vegetable garden.
I was told this has nv flowered. And according to "experts", it's because it's touching stake/support. Other reasons - it needs to be blasted by full sun for at least 1/2 a day + NPK.