Is the one plant stunted??

Hi, You’re doing too much too soon. You do not need to be feeding anything but water this early on. There’s enough nutrients in your growing medium to last up 4-5 weeks without adding any extra. You will cause root lock out and your plants will then be stunted which is where you’re at. All you need to do is focus on watering, but not over watering.. only water once your medium is dry. Good lighting, and ventilation. Stop the feeding otherwise you’ll run into problems. Other than that things look ok. She can recover, just don’t over do it. Hope this helps.