BTW, one thing I've noticed (with peppers). Some varieties/species respond differently than others to heat in the germinating bag, and presumably in soil.
IIRC (sketchy, that),
C.annuum likes closer to room temp.
C.chinense, especially the persnickety super-hots, seem to like a period of relatively high temp (up to 85F) then cooler (mid-70s).
Which ones isn't important - the point is, splitting your batches and trying some at higher temp and some cooler may help identify a preference.
