my bet is on the Scott's Soil as the source of the problem ... overwatering will cause Pythium Wilt with seedlings, but these rich potting soils are killing seedlings, too ... I lost a bunch of $$ seeds to Fox Farm Ocean Forest soil, it's just too rich, burnt them right up ... (Fox Farm does make a "Light Warrior" soil, that is mild, especially for seedlings) ... after the plants are a couple inches tall, there's nothing better than Fox Farms soil ... try a plain, mild soil, with sand or perlite added, see if you don't have better results ... good luck ... :smokin: