Trouble in flower

[xHades4]

Hi guys, so im currently on day 22 of flower and ive hit what seems to be a wall, i have many yellowing leaves and over the past 2 weeks ive gradually upped the nitrogen as that was my first go to, but with the problem only getting worse and with me not wanting to overdose my girls on nitrogen during flower im struggling to see where the problem is, ph is slightly off and heat is around 80F day time and around 70F night time, if anyone can help that would be a massive relief off my shoulders, its feed day tomorrow and im going to give it some calmag and another 2ml/L of biobizz grow along with the usual flower nutes

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[Macky]

Can you get a close up pic of some of those leaves mate? When you say the ph is slightly off, what is the ph, are you in soil or coco?

[xHades4]

Sure mate, run off was 6.7 last time i checked which was 2 feeds ago, im in soil, canna terra professional and here a close up of the leaves

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[xHades4]

And the water im putting in is 6.3ph which is tap water sat for a few hours

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[Macky]

I’m not sure if that’s nitrogen mate, the tops of the plants are good and dark green. I’m thinking maybe a pk deficiency as they’re in flower now. But not really sure. Need a second opinion imo lol

[M_C]

Moved to infirmary...

[xHades4]

If anyone has any suggestions id really appreciate the help, i was debating a flush but with the ph being abit off that i already knew of, i didnt know what ph to flush it with that combined with the fact that im on week 3 of flower now and i would have guessed it would interfere with my yield at the end if i flushed now?

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[CityDweller]

Looks like something that was fixed maybe? Perhaps a calcium deficiency that was rectified and maybe a little too much N? Hard to say. Are you still seeing new yellowing? If yes I would try adding some calcium. No more nitrogen at this stage.

My best guess is calcium deficiency and nearing nitrogen toxicity.

[CityDweller]

When you add the nutes to your 6.5ph water do you raise the PH or just feed at around 4PH? If feeding salt nutes at a PH of 4 you probably have nute lockout.

[cannabisphilanthropist]

whens the last time u flushed??

looks like id flush and trim,,yellowing attracts insects so get rid of it asap.