What’s going on here please?

[Shags]

Here are some photos

 

[the green bandit]

I've always found sativa dominant plants to be less hungry and a little more picky about their feeds compared to their fat fingered cousins

If I remember correctly sativa dominants are nitrogen hogs. I know my jack herer use almost twice what the others are. And it never hurts to flush.

 

[Bill.de.Cat]

I've always found sativa dominant plants to be less hungry and a little more picky about their feeds compared to their fat fingered cousins

Guess it's safer to say every plant is different

 

[Waira]

Thanks Shag's! :smoking:

So, in a true soil, feed dosage seems OK, but frequency may be the culprit, a cumulative thing with an gradual build-up of excess in there,.. No signs of burn, may be borderline but enough to kick off some antagonistic uptake issues; this is when certain nute ions in (over)abundance may interfere with the uptake of others... That, and/or the in-pot pH is off, which explains the sudden onset. pH can go sideways pretty fast, so many other influencing factors once in the root zone.
New pics... they look paler on the tops vs. bottoms in the pics, but it's hard to tell for sure? If so, it another clue; symptoms appearing on tops strongly hints at a micronutrient defc./lockout. Most of them are immobile within the plant, can't be translocated from older tissue to support new growth...

Some of the paling out is normal of course, but this is too advanced for this stage, sudden as well...

With no in-pot pH reading, it's guessing, and so pretty much defaults to doing a flush... Use low ppm water if you can, this way you can also get some sort of read on the pH and run-off EC at the same time.... Hard water has pH buffering minerals in it, so this may skew pH and is a bit less effective at stripping out the excess ion load that I suspect is in there... Same deal as pH, the soil will have a certain EC alone no base to compare with so if your EC is very high, well over 2.0 that may confirm some of this,... As mentioned the ph reading of run-off is dubious but if way off as well, you know there's a problem and flsuhing will cover that base even w/o an exact reading... Just make sure your EC and especially pH meters are calibrated... That little thing has jammed up many a grower!

 

[Shags]

Thanks Shag's! :smoking:

So, in a true soil, feed dosage seems OK, but frequency may be the culprit, a cumulative thing with an gradual build-up of excess in there,.. No signs of burn, may be borderline but enough to kick off some antagonistic uptake issues; this is when certain nute ions in (over)abundance may interfere with the uptake of others... That, and/or the in-pot pH is off, which explains the sudden onset. pH can go sideways pretty fast, so many other influencing factors once in the root zone.
New pics... they look paler on the tops vs. bottoms in the pics, but it's hard to tell for sure? If so, it another clue; symptoms appearing on tops strongly hints at a micronutrient defc./lockout. Most of them are immobile within the plant, can't be translocated from older tissue to support new growth...

Some of the paling out is normal of course, but this is too advanced for this stage, sudden as well...

With no in-pot pH reading, it's guessing, and so pretty much defaults to doing a flush... Use low ppm water if you can, this way you can also get some sort of read on the pH and run-off EC at the same time.... Hard water has pH buffering minerals in it, so this may skew pH and is a bit less effective at stripping out the excess ion load that I suspect is in there... Same deal as pH, the soil will have a certain EC alone no base to compare with so if your EC is very high, well over 2.0 that may confirm some of this,... As mentioned the ph reading of run-off is dubious but if way off as well, you know there's a problem and flsuhing will cover that base even w/o an exact reading... Just make sure your EC and especially pH meters are calibrated... That little thing has jammed up many a grower!

Thanks Waira,

I have her a good flush with tap water at ph 6.4 a few days ago. Didn’t measure EC or ph of run off.
And gave her a feed using 1/4 strength nutes yesterday and ph’d tap water today.
I reckon she even looks a bit better already. Will the leaves get greener, or once they go yellow that’s it?
I was feeding nutes before issues appeared 3 times per week, maybe that was one too many.
I’ll stick with 2 feeds a week from here on in

 

[Waira]

They may improve some, but at this stage they don't green up much anyway. More important is hopefully the flush fixed the problem; she may finish looking haggard but can make some good bud yet! That PK booster will help....