I’m at a loss: here we have a little Apollo 13 seedling, just starting on its third set of leaves, but the first leaves are turning unhealthy in a hurry. This happened over the past 48 hours, but it’s also the third A13 seedling I’ve watched this happen with (and it looks like the fourth seedling is about to do the same).
I’ve been trying to go light on the watering with the seedling pair I have going now, as I thought that the problems I had with the first two seedlings (who are barely clinging on to life) might have been overwatering/root issues. With the first two seedlings, this crispy death would slowly consume the oldest leaves, and just steadily climb up the plant.
The oldest-to-newest progression makes me think this is more nutrient-related than root related, but on a plant so young?! Are there plants that are such nutrient hogs that you need to start feeding heavily by the 2nd/3rd set of leaves?