I don't bother Trainwreck nothing but do alot of other cookies and crosses and based off the picture posted he's going to run into problems with k. I never did Trainwreck before so if you know then you know.
Without reading back to verify I think k was certainly a possibility tossed around. There are a lot of cookiewreck threads on ic I think. People tend to attribute some of the funky growth to a cookie leaning pheno.
But, I don't REALLY know.
Its hard to get to the bottom of these things. My big discovery was that in fact that these phenos are ugly more or less so I didn't freak out and start correcting my soil.
Clearly they demand a specific feed as opposed to the generic one size fits all.
I tend to not grow shit again if it don't get along with my very sensible feed regimen.
If its amazing I will consider keeping its ugly finicky ass but its gonna have to be real deal next level great.