tuncse, pretty and very healthy. Did you keep track of its age from seed? I have 4 RedRobins just transplanted into 4" pots. 3 are just 4" tall, one is a tiny 2". Awfully slow growing.
..." Any more, I make them show me a blossom before I move them out of the red cup into their final home."
That is good advice. I've stopped culling. I have room to pot up all of them, then look for a centered cluster/blossom. Good project.