Zenman, I just discovered keithp2012's thread about wax begonias' self-sowing outdoors after winter, so crossed this discussion with that one -
The thread "Wax Begonias return year after year" in
Annuals forum .
Another thing that might clarify this riddle about germinating flowers with temps that would kill said flower when leafed out has to do with a characteristic of flowers known to be wintersowable: they are known self-sowers, which is also often true of "hardy annuals.". If anyone knows how Mother Nature does this, I'd love to be clued in.
