Ansellia africana

[Spiffy]

I have a smaller division growing on a sunny south-east facing windowsill here in the UK. Just 6 canes currently although a new one this year that is showing good growth and about halfway to the size of the tallest.

I'm looking forward to seeing it pop some spikes out, but I'm wondering if you have to do anything special in order to encourage it to bloom? I read sometimes that they need to be dehydrated towards the end of summer?

My one is potted in large bark chips, charcoal and a bit of spag. It needs very little watering with this setup, ie just run water through once per week, no soak, even now here in UK 'summer' (RH is about 50%, reckon temp min max on the windowsill is 16 - 25c on a sunny day.)

Thanks for any pointers!