Look Out, excess or deficiency?

[exploziv]

yeah, it could, but then you have to make sure you are not going too low. plants already getting some food through the leaves, if they managed till now your fix will come soon.
If you decide to flush with lower PH, just make sure to put more than enaugh to saturate it again with 5.5-5.8 after.

 

[Hasch]

Ahh, now I understand, thank you for the explanation

 

[Hasch]

Ok, I'm at my wits end :-(

The plant with the massiv problems got flushed, I used 4l of water (12l pot).
flushing water Ph 5.54 + EC 0,8
run off: ph 6.4 + EC 0.8

Then I flushed again with 4l of water Ph 5.2 EC 0.7
2. run off Ph 6.5 EC 1

Then 3rd flush Ph 5.1 EC 0.3
3rd run off Ph 6.5 EC 0.8

Seems like the Ph of 6.5 is somehow locked in...
Is that possible?

What do I do now?

These being auto flowering plants I feel like this almost beyond saving. It has started flowering now

 

[Three Berries]

Flushing requires a lot more water than that. 5 times the pot size to start.

 

[Creeperpark]

You are overdoing it. Your basic soil pH should be between 5.8 – 6.2 for coco coir for maximum nutrient absorption. When flushing its best to flush with nutrients in the water so the plant can uptake them after the flush. When you jump around with different fertilizer formulas and pHs the plants get lost. The best thing one can do is keep the ppm and pH consistent and don't flip-flop between strategies. Start your nutrients low in the beginning and slowly raise the ppm as the plants grow. Anytime I see someone flushing a plant like the above, I see someone trying to fix what they can't fix.

 

[exploziv]

U just water with the target PH till you fix it. It's probably ways off so it will take a while to correct. That, or you are fighting somekind of a ph buffer in the soil. Don't worry, even if it doesn't seem so, it's getting better for the roots in there with every watering.
And that's a watering at 33% pot size, not a flush. A good fluffy soil mix would not even give runoff so early.

 

[Corpselover Fat]

Measuring runoff in coco will give silly results. Never mind what the runoff is and instead just feed in proper ph and ec to 20% runoff.

 

[Hasch]

Hey
Thank the gods (goddeses?) the anemic Jack Herer is recovering. I guess the yield would be different without the Problem, but hey, my first grow after 18 years and first time in coco.

Thank you for alll the help!

Stay safe everyone and namaste