Hi Pieter, I flipped through "The Genus Arum" by Peter Boyce ,which has distribution maps , and I didnt see any Arum species that grow in Sicily . It appears that Arum italicum is not native to Italy either. I have found that sowing Arum seeds is best left until autumn . An earlier sowing will often cause germination to be delayed by 12 months. Its not a genus that enjoys living in a pot so I generally transplant seedlings to the garden after 2 years of growth. Cheers, Rob in Tasmania