Didn't want to hijack a (similar) earlier thread........ ;)

Some background: Have propagated annuals/vegetables for 4-5 years using all the right equipment & tutored by Dave! ;)

Last Spring built my first (small, heated) GH that I'm still getting a feel for......

Just sowed about 200 pelleted seeds of wax (fibrous) Ambassador F1 begonias........ I'm allowing 14-16 weeks from my LFD (May 1) for the plant out date......

Surface sown in a flat of Pro MIx BX, misted & covered.... placed under a 4' T8 2 bulb fixture (on 16 hrs/day)..... on heat mats (73F), in a germinator......

I'll pull them at first sign of germination & place them under 4' 4 bulb T8 lights until they form their first true leaves, at which time I'll pot them up slightly........

What have I missed so far?