A recent development in the saga of the baby grapes: Downy Mildew! Yes, this fluffy stuff is all over some of the leaves. Looking online, I see that causes are generally being in a damp place (which the laundry room certainly is) with poor air circulation (which the laundry room generally has). The cure is spraying with a fungicide, so after an appointment this afternoon I will be purchasing some of the stuff (mmmm...toxins!) and seeing how well it works.
In theory, the mildew only kills the leaves it's on, but the plants are so small that I want to save as many leaves as possible. Also, we're more than five years from first harvest, should they last that long, so I don't feel too bad about using a toxin on them.
The tray of small babies is still struggling, though there's one guy in there who seems to be doing better than the others.
As for the first-germinators, apart from the Downy Mildew, they are doing fine. We might have to re-pot many of them soon. Maybe I should get some gallon pots and wood for stakes while we are buying fungicide.
