Hi! This was my first year doing seedlings as well.... and alas i have lost most of mine....i started them inside because i was so excited i couldnt stand it. ..and that was my downfall...if i could impart any wisdom AT ALL it would be whatever you do dont start seeds indoors...start them directly outdoors unless you have a greenhouse or such..what you are describing happening to yours is called root rot...or damping off...one of the two...once one gets it they usually all get it...im going to assume from what you are telling me u started them inside like i did....
