Really a Phosphorus Deficiency?

Hey there medical, so usually a vegetative plant won’t really show phosphorous deficiency because it doesn’t use much of it. What you have looks more like nutrient burn , you can see this from the burnt tips. Maybe when you fed it messed up the pH a bit as well, the splotchy aspect of the discoloration points to that. Usually in amended soil you don’t really need to feed for the first four weeks. Just hold off on the nutes keep the plain water going and hope that the plant recovers . Hope this helps ! 🚀