I've never harvested Magnolia figo personally both other mags are ready for harvest in the fall. The seeds turn red. Here's a link about magnolia with some pics of various seed pods: http://toptropicals.com/html/toptropicals/articles/trees/magnolia.htm

I think there's a magnolia forum for more info.

convert to the latin name ... go to google .. and add propagation by seed to the latin ...

when you are dealing with a common name.. as common as banana.. you should appreciate why the latin is imperative ...

ken