I found this page which says the seeds should be propagated at room temperature:
http://www.robsplants.com/plan... and read that seed should be sown when fresh.
This page says seeds can be very slow to germinate:
http://www.pfaf.org/user/Plant...
It sure is a pretty Begonia! I've never heard of a begonia becoming invasive so I will be interested to hear what others have to say on that matter.
