It's really hard to guess without a visual to go with your description....

It might be the "new" soil.... Especially since you say this is your first adverse experience with seedlings....

CGI::::::

Got any pics???
CanGroIt Reviewed by CanGroIt on . yellowing seedlings help needed pls I have some cheese and bleuberry seedlings that dont look very healthy First time i have had a problem with seedlings? Im using the new vita link soil mix and im hoping it aint that, has anyone else used this soil? I got them under a 250 cfl, no nutes have been used The seedlings first 2 set of proper leaves are yellow, the new growth looks fine Rating: 5