Ok so I got a indoor auto(landlocked funk) grow in soil. Started off in a solo cup and transplanted at 3 weeks into 12liters. When I took out out of the solo I could see the roots at the edge of the cup but wasn’t knotted up. Well I’m at near 8 weeks and near 4 into flower and it didn’t stretch much at all(last grow of this strain stretched 2 feet with topping and training). When I dig the soil back it looks like the roots are still about the diameter of the solo cup or maybe slightly bigger. Obviously the didn’t take to the new soil which is same kind as in the solo. I know I’m sol just trying to figure out where I went wrong and how to prevent it in the future. Any input appreciated