Lots of nitrogen in them leaves by looks of it, make sure to ease up on whatever nitrogen your still feeding moving forward. In essence, the stem acts as a central hub for nutrient transport and storage, facilitating the plant's growth, Stems store a variety of nutrients (NPK), although primarily sugars and water.
Plants got lots of nitrogen stored for later use.
Very very slight ec tips showing through too so your medium nearly to being full capacity on salt minerals.
Growing well, jist make sure to keep watchful eye. Good luck.