Severe reddening of main stem.

I dont have any pictures right now, but a clone that has been transplanted into a keg cup has a solid red stem. Literally the entire stem from the dirt, through the nodes, and right up until the leaves is red. It was overwatered early on, but its been two weeks since it has been transplanted and hasnt grown an inch and still shows red stems. Leaves are also sagging, not wilting. Will update with pics when I can.

phosphorous deficiency, or genetics but id lean towards phosphorous def. just get a good base nute line for veg and youll be put on the right track soon enough.