Yea some seeds can deal with low temps but not many garden variety. Fascinating seeds
have built monitors, they monitor outside temps before they even germinate
and that is truly amazing to me

last year I used a magnifying lens and a camera, I was doing some research
to see how well seeds germinated on wet napkins. here are some pics
TOMATOES
[attachment=2:3ui8spvu]IMG_0364.JPG[/attachment:3ui8spvu]
[attachment=1:3ui8spvu]3-8.JPG.JPG[/attachment:3ui8spvu]
[attachment=0:3ui8spvu]IMG_0362.JPG[/attachment:3ui8spvu]