schreef
Thanks all for enhancing my botanical knowledge ;-). I will certainly
mark the location of my plant and be on the look-out for anything
inflorescence-like in the spring!

***
Flowering in Arisaema is known to be related to the reserves the plant has.
If there are no fruits this year, most likely it did not flower this year,
and it is not all that likely that it will flower next year.

It will flower only when it is ready.
PvR