It's the wet following the dry that does my pot-grown seedlings in. I water like mad during the hottest months, but then there is a window of time when it starts to cool down and things, superficially at least, don't look heat-stressed, so I ease off the watering. The danger though is that the pots get drier than I think they are. Some young bulbs get too dry and roots die off... eventually the rains come and pots get soaked and bulbs rot because they don't have a healthy root system. At least that's what I think is happening!
I lose fewer seedlings in styrofoam boxes though. Better insulation and better drainage. In good mix and with favourable conditions, many asiatics (and, I'm discovering, Div. VI too), will flower 18 months from sowing. I don't disturb (transplant) them at all during that time, but do add fresh mix to the surface as it settles quite a bit.
