I have been growing a Rivea corymbosa or ololiuhqui plant for about 5 years now. It is planted on a WA farm in a semi-arid climate. The plant is HUGE and has has covered about 20SQM. But for the life of me I can not get this thing to flower. I have tried adding a fair amount of phosphate over the years but still no flowers. If anyone has any tips on getting this beautiful creeper to flower I would much appreciate it.