reviving wilted seedlings - why is potting up working?
My seedlings got too much sun the past couple days, and some of them were seriously wilted. They've been outside a lot. But it's been cloudy most of the time, and they had just spent the day inside, so the full sun was just too much for some of them. And I thought they were dead for sure. But three of these undead seedlings were about 6 weeks old, and were some of my practice plants. So I decided to pot them up from their 1 1/2 inch soil blocks to 3 inch blocks. They look perfectly healthy now, and I can't tell them apart from the other ones. So I tried potting up 9 of my smaller undead seedlings last night, and 6 look great today. 2 are still wilty, but improving. And only the crispiest one looks like it won't make it. But I potted that one up thinking it would take a miracle for it to survive. I just wanted to see what the limits were. So I have a couple questions.
1) What is it about potting them up that's working? Did they just need water? They're pretty saturated now with the new blocks. Watering the smaller blocks didn't seem to work as well. But I only watered them lightly, because I didn't want to overwater. Or did they need some nutrients that may have been depleted from the smaller blocks? I overwatered them when I started. And I read something digdirt posted about nutrients getting washed out with overwatering. So I thought that could be part of the problem. My soil mix has some compost and a small amount of azomite, greensand, rock phosphate, and cottonseed meal. I still have a lot of undead seedlings to revive, so I'm wondering if there's a quicker way than potting up.
2) Will the undead be less productive? I'm going to use them anyway, but I'm just wondering if I should expect less. Or will they need any kind of special attention?