bigdog

Mark, I'd skip the vermiculite. While it does enhance drainage, it also holds a lot of water. Perlite is a better option for seedlings. I used Promix and perlite for mine. I think the key with these is lots of heat and full sun. I had three sprout for me, but only two made it. The first one died a month or so after germinating, after not even opening up its first leaf. It just seemed to be a weak seedling. The other two took off immediately after germinating. I do water them sparingly when very young, only keeping the medium evenly moist. The only Musa sikkimensis I ever got to germinate (so far) damped off on me. I had it in a different greenhouse that had shadecloth and was cooler than the other one. Don't know if that made the difference, or if the pot I used wasn't sterile or what.

You may just be getting some weak seedlings, and nothing can be done about that. They are just going to die anyway. Good luck with them! You'll get one going sooner or later. They are worth the wait!