Phosphorous/calcium?

[teamfdn]

After going through the deficiency thread, I would guess that this was a phosphorous or calcium deficiency. I also noticed that it shows up a day after feeding. I'm just hoping someone with more experience can take a look.

 

[Waira]

...looks like P defc. to me too, a hint coming from that colored petiole,...though that can be part of normal color expression too, strain depending,... I need a whole plant pics, and soil+ nute' info, what your feed regime is, and most importantly, pH of the soil...if this is associated with feeding consistently, it smacks of off-pH,....