Viewing post #3091831 by Vals_Garden

I've grown my own tomatoes from seed for decades now (Sungold) but this year, after sowing March 30th and getting 100% germination 8 days later, my seedlings (covered, under lights as usual) - two weeks after appearance are still at the two seed leaf stage - no true leaves showing. Something is wrong The only difference from past years is a new bag of seed starting mix. The seeds are from the same (bulk) pkt I have been sowing for the last 4 years. They are not leggy either.
Any suggestions as to how to jump-start these little things?