The trainwreck twins are not as deep green as the goldleaf twins to the right of them.. They also have leaves that curl down at the tips. I’m guessing that it’s nitrogen deficiency because they started out further along than the goldleaf seedlings. . This seedling soil has no nutrients in it. I’m tempted to transplant up to solo cup size with FF Happy Frog soil. This will be earlier than planned: waiting until 3 or 4 sets of true leaves.