Sloppyanswered grow question 5 years ago A couple things appear to be going on here. Like above have said, they appear to be overwatered. You should only be watering when the pot is light(couple methods here) but MJ plants like O2 in there roots. Try limiting watering to just what is needed at the time and only 2x a week.
You also need to get the humidity in the room up to atleast 50%.
When you are working with autos, you should plant them in the final pots, for a couple reasons. One being they are autos and you don’t want to stunt the plant because you can’t just add extra veg time. Secondly, auto roots go straight to the bottom of the container first. If you don’t plant in final pot, you are limiting the growth potential of your plant.
Suggest potting these in a 2-3 gallon and in the future potting them in 3-5gallon pots from the start and only feeding a tiny bit of water until the thing starts to grow well.
Nutrients seem high to me for soil in the veg period... may want to look at that, and flush the plant if it has caused your root zone to get hot or ph imbalance.