I grow Sinningia bullata indoors on a south-facing windowsill, and it is a heavy bloomer for me, too. Strangely, though, the large bulb soon developed deep cracks in the top surface when I acquired it. I got scared that it would be an opening for disease & rot, but the plant seems fine. I've had it over a year now. I loooove the fuzzy undersides of the leaves. Dennis in Cincinnati