All these (yes,
all these) have germinated for me yet:
Ensete ventricosum
Pretty many, huh?
The first three species I got and sowed, was sowed in only moist vermiculite, but those three first ones have not went quite good, it smells like Erlend said, like the breath of your algebra teacher...
Now I mix about 2/4 soil, 1/4 sand and 1/4 vermiculite, and I've added a little perlite. Seems to be a nice mix for me, at least the Ensete ventricosum liked it!
Gard