All I can tell you is that our dragon arum is planted between some fruit trees in heavy clay ground and surrounded by grass. So it's shaded and quite damp most of the winter and spring, and baked fairly dry in summer.
It has come back each spring after very low temperatures and we have never needed to do anything to it other than weed around it a little and support the growing stem and flower.
The only problem we've found is that the stem gets top heavy and rots off fairly early on, even before it's finished flowering.
Therefore a moist slightly shaded site should be ok.
(The other one I knew was right against the wall of the school where I used to teach, in very poor soil)