stem rot???

Hi guys,

Noticed my plant is starting to gurdle itself just below the first node,

Is this stem rot? growth remains vigorous, for now...

Damping off. Survival unlikely.

Are your temps abit chilly?
Is the stem thinner than normal and woody? And its a bit purple right

I dont know how the stem would rot, i mean roots sure, but the section your talking about gets plenty of air. I would guess p def..
Wait a sec
Are you that dude i talked too earlier? If so then yea.. over feeding is causing most of your problems. Too much n will halt uptake of calcium. Calcium in High concentrations binds to phosphorus making calcium phosphate which is pretty insoluble
It also looked like metals were being locked out