Iron? Sulfur? Root bound? Underwatering? WTH is hapenning here?

[Fakir710]

Hey duderinos! I was checking planta yesterday and they looked slightly better, let's see how they look in a week or so.

One question, I need to top more some of the plants for control the canopy height, but some are suffering from this yellowing. It's a bad idea to top them, right? Or can I!?

Thanks and regards.

I had the exact same problem, and your plants looks exactly like some of mine...
It turned out that for some reason the soil I bought didn't pass any quality inspection and some bags were poorly mixed with lots of shitty hot compost that first gave me some sign of K toxicity and then I had a huge PH drop in the soil

I fixed it adding PH up to the water, watering with ph 7 water and keep the nutes in the right PH range made them green up and completely healthy...

hope this will work for you....
Check the PH of soil...

Hey, thanks for answering, I thought about that as well, but how can I know how my soil is not well mixed or if it's too hot at the moment? Ye, they look very similar, I got no soil PH meter, I got one but the shitty cheap plastic one with metal sticks, I don't think it's accurate. But will try to measure the run-off water Ph.

I always measure and add PH - or ph+ till 6 - 6.5

Do you have any thread explaining your problem or just guessed yourself?

Best energies for your plants to recover fast and soon!

Regards!!

I'm going to say a sulphur deficiency mixed with a nitrogen deficiency. You need to water water them well. To treat the sulphur problem get some epsom salts and give the plants 2 maybe 3 sprays over 7 days. Epsom salts are pure magnesium sulphate, great for treating sulphur and magnesium problems.

Hey! Hi Buddie and thanks!

Yeah I thought about that as well, I got some Epsom salts 3 days ago, if the plants don't get better before the second application of formulex I will spray them. With Epsom as well, I was reading about supplementing sulfur for maximize the flavonoid expression during mid flowering.

Any clue about that? I tried to find some Info but nothing in the forums.

Regards.

Well if you try this for a few plants, you can find out. If you place 5 plants on a folded crate, and they improve, you'll know what is/isn't the cause.

And it doesn't need to be more than one or two inches, it's the ground that is conducting the cold like a copper wire can conduct electricity.

Yeah, Defenitely gonna do it, at least with a couple of them I got a kind of small chair for kids that I can use. I got no money for adding tables to my entire setup right now, but I'm planning it, not just for the plants, also for being way more confortable when watering girls and don't fuck my back anymore...

 

[Grapefruitroop]

Yes I measured the runoff of the soil first with a ph strips and then with a pen.
was very low so I decided to water with plain ro water and ph up till 7 and they immediately greened up, so I continued for a week to give plain phd water to unlock all the nutrient and then I started feed again...

For me was easy to point at the ph of the soil cause I transplanted the same clone in 3 different brands of soils, and one (the one with the sick plants) was very stinky of ammonia and full of big black chunks of compost

If is a ph problem, with just one watering of high ph water you should see immediate improvement..