I repotted and fertilized some seedlings this past month, with the result that one died (rot), another lost 2 fans (rot), and yet another just lost 1 fan (rot).
I'm holding off any more repotting AND fertilizing, unless maybe if the plant is in the ground, until late September/early October. I have a feeling that I'm going to have to de-pot and somehow treat the 2 ailing ones, or else I'll lose those, too.