Looks good. I would have centered that one plant in the center of the pot. When you transplant, center it a little better and bury it two inches below the lowest leaves. Soil looks a little wet. Maybe you just watered. It might have fallen out of center, by not being close enough to the light. That could cause stretch. Is there calcium in your tap water? I use RO and add Ca, but it doesn't look like you have a problem with nutrients. Maybe add some silica to strengthen your stalk, so it doesn't fall over. I would get 50ppm of silica in there. You could prop her up with a chop stick.