What are the "babies?"

What medium are they in now?

How far along are they?

If they are literally "babies" they are feeding happily on nutes from the seeds, and from the early photosynthesis of new real leaves. At this stage, they don't need, and can't use external nutes.

hollyhocks, nicotiana, cupid's dart, lamb's ear, dianthus, echinacea, shastas.

They're in Scott's potting mix. Not soil, but mix. Most have the first two leaves, but some of the hollyhocks have their first true set.

They won't need ferts for weeks and weeks, if then.

Thanks. I seem to have lots of trouble knowing when to fertilize seedlings. Some of my hollyhocks from last year too forever to grow. I think ignoring them worked better than anything.

Seedlings should be fed only weak feedings.

Here is a link that might be useful: Fertilization

Only after I transplant? I can't imagine they'll make it 100 more days.

You'll begin transplanting in the beginning of MArch...that's six weeks.

Really? SWEET!

I'm still stuck on the last frost thing.

I've never fertilized any of my seedlings. They are always planted in a potting mix. I figure that will give them plenty of food to keep them happy until I transplant them sometime in the first half of the growing season.
Only apply organic fertilizer to my containers after seedlings have been transplanted for a bit. And even then very little maybe twice a season. Always happy with the results :) The garden beds get a dose early in the spring or late in the fall (whichever season I have more time) in the form of compost and that is usually it.