Begonia boliviensis
Kenneth Hixson (Sun, 02 Mar 2008 09:51:44 PST)

Hi, Deborah
I'm not an expert on Begonias, but I did plant
a few seeds of B. boliviensis about the first of January
under a flourescent light fixture. Begonia seed is very
small, and slow to get started. They mostly need to be
kept warm--about 70-75F, and moist. Drying out is fatal
until they've reached the tuber formation size. My
seedlings now have one or two leaves about 3/16" across,
and now will start to grow faster. They should flower
by mid-summer here.
B. boliviensis is fairly hardy, and can be left
in the ground to about Zone 7 or 7b. Not totally dry,
just not soggy wet when dormant. I haven't tried digging
it and keeping it indoors in winter, but would treat
it like tuberous begonias.

Someone else may have better suggestions.

Ken