Hello. New member here, my first post. I'm growing out a number of Dianthus seeds that I recently purchased. I have a few of what are supposed to be Dianthus Alpinus. A few days ago, one of them, now about 3/4" tall, started to develop what appeared to be mishappen/discolored leaves. Today they had developed enough that it was clear that no, it is flowering. Does this look right?
Dianthus hav five petals, but anomalies like yours are bound to be disfigured from what a mature plants flower should be. Otherwise, this look right so far. I can't be 100% sure with such a tiny immature plant, but the ID is probably correct. I've never had a dianthus bloom so precociously, but other species, yes. You will want to remove the flower, as it is a huge energy sink, preventing further growth of the plantlet.
Just FYI, I removed (most of, with tweezers & magnifying glass) the flower as suggested. Here it is a week later, not quite dead yet. Also here's pictures of its two seed-packet-siblings, doing far better.