I thought Tuberous Begonias bloomed in total shade but mine are growing tall and stringy with no blooms. I just moved them into about 50% sun. Should that work?

I would like to know the same thimg also. I've wanted to grow both tuberous and rex begonias from my own seeds, but I don't seem to be able to get viable seeds. Is there some trick to getting begonias to set viable seeds?

egk47