I actually gave them some DynaGro Foliage Pro, I have to say they seem to like it. The newer leaves do not have the curling. They do have a bit of the purpleish hue, but they are not cupped or curled.
At the end of the day, I feel like they may not be the prettiest tomato plants in the world, but they should transplant fine and bear fine for me.
It looks as if you have already figured things out, but this looks like a temperature issue and not a nutrient deficiency (insomuch that the issue is nutrient uptake and not the amount of nutrients in the soil). Unless you’re using a seed starting mix with zero nutrients, my experience with seedlings indoors is that most problems that look like a nutrient deficiency are actually nutrient uptake problems from the temperature or an issue with the lights.
They look beautiful now!!!
