Do you grow Jatropha integerrima at La Mortella, Alessandra? Coming from the Caribbean, presumably it's used to a pretty wet hot season. So I'd guess that it needs quite a bit of watering, and perhaps high humidity, to do well in mediterranean conditions? It seems to be much more popular in subtropical countries, and areas such as the South East states of the US, than in say the Med or California. Do you think it's worth a try in mediterranean conditions for people who are short of water?
It's certainly a striking plant. Worth knowing that although it can grow to quite a large shrub, or even a small tree, if happy, there is a dwarf cultivar, called I think 'Compacta'.