We need all the info on your grow including: What type of medium; soil or hydro? What brand and type of soil? Indoors or outdoors? What strain? How old are the plants? What type of lights and how many watts? How far from the lights? What is your watering frequency and source of water? What, how much and when was it fed? NPK? What is the medium/runoff pH and PPM if in hydro? What are the temps and humidity in the room? What size pots? Any bugs? Look real close. Any other pertinent info?
Honestly I lost track of a few plants, it's under two weeks old, soil, same soil as my other 8 plants that are fine, any chance i gave it the wrong water bottle? the one for older plants?
I planted 4 seeds this go round, two popped healthy females, one healthy male, and one yellow runt that struggles thru it's 3rd set of leaves after 3 months until I finally gave it the axe just a runt imo, no sense trying to help it along if it's gonna grow like shit the whole time. dump it and get a winner in there.