Fan leaves yellowing in between veins in late flower - Deficiency?

[Edec16]

Hi, iam currently coming the the end of my second grow.Its an indoor tent grow using canna coco nutes, hand watering daily, and ph around 5.8-6.2, im about a week to 10 days away from my two week final flush.


The problem is im getting strong yellowing inbetween the veins on my main fan leaves on two plants (out of seven) and this has spread quite rapidly.

I obviously dont want this to lower my overall yield and would greatly appreciate some advice, im pretty sure its not a nitrogen deficincy and i havnt gt a clue what it could be.Any help would be appreciated as im obviously a newbie to this, thanks.

 

[Edec16]

 

[improvise]

i looked at sticky`s pictorial plant problem solver by the way it`s very helpful.

closest reference picture for me is nickel deficiency.

although overall i wouldnt worry bout it too much i`am sure you`ll still get a harvest.

you can find the pictorial problem solver on bottom of grow room menu posted by sticky.

regards

 

[Edec16]

Thanks for the reply,

 

[Amadeus Forzin]

I had the same on one of mine. Turned out to be a ph lockout causing various deficiencies. Flushed and flushed, finished with a light feed and she appeared better