Strange big plant

These two plants are suppose to be Banana Kush. Both were planted at the same time, sprouted the same day. They are three weeks old. Only difference is one is hydro and one in dirt. Any idea what they could be?

Given how the hydro leaf is showing some deficiency you probably didn’t get the nute mix or ph right and welcome to the community

Ph has been a real pain. I monitor it 4 times a day and there has been big swings so I’m not surprised there.

W/O a large reservoir it’s hard maintaining pH… it’s funny though you know hydro usually outgrows soil atleast 2:1 somits backwards…lol

This is my first hydro plant so I’m happy something is growing.