High soil pH, any sugestion on how to low it, please?

C

CannIHarvestit

Member
Hello guys, how you're doing?

I think my plants are with P deficiency (leaves darker in the middle) what do you guys think?

Any suggestions on how to low the ph? I've been measuring it wiTh pH straps from the run off water, and it's above 7 :(

I tried lemon juice, white and apple vinegar dilluted in water, but their leaves doesn't chance much this inside darker colour. I think their leaves are also too small (what do you think? I'm not advanced at all, pretty much begginer, 3th indoor grow) despite the lst. (Maybe small leaves because of the lst?)

Any thoughts?

I just did a top dressing with 2/3 peat moss (try to low ph of infiltering water), worm castings and ashes (start flowering soon)


160w house led buld (20/4)
Peat + vermiculite + lime (think added little more than I should've) + worm castings
I water them every 7, 8 days, or when the pots are light enough to move easily.

Thz!
 

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C

CannIHarvestit

Member
Small leaves / growth could be related with too much spaced time without watering? Like, instead of water 1L every 8 days, water 0,5L every 5 days?
 
Bukvičák

Bukvičák

Well-Known Member
CannIHarvestit said:
Hello guys, how you're doing?

I think my plants are with P deficiency (leaves darker in the middle) what do you guys think?

Any suggestions on how to low the ph? I've been measuring it wiTh pH straps from the run off water, and it's above 7 :(

I tried lemon juice, white and apple vinegar dilluted in water, but their leaves doesn't chance much this inside darker colour. I think their leaves are also too small (what do you think? I'm not advanced at all, pretty much begginer, 3th indoor grow) despite the lst. (Maybe small leaves because of the lst?)

Any thoughts?

I just did a top dressing with 2/3 peat moss (try to low ph of infiltering water), worm castings and ashes (start flowering soon)


160w house led buld (20/4)
Peat + vermiculite + lime (think added little more than I should've) + worm castings
I water them every 7, 8 days, or when the pots are light enough to move easily.

Thz!
Click to expand...
You have either potassium def or you have added too much ewc and food, but not phosphorus def. Runoff means nothing but when it comes out higher than input than its weird. You are kinda onrganic soil which I know shit about, so I may be completely wrong. Hopefully somebody help you better. GL!
 
Zmetrakilo

Zmetrakilo

Member
When you grow organic pH should be 6.5 or more, stripes are not useful. In your pot live bacteria and low pH will kill the in some parts. They are helpful for your roots. I think you should give them only water without nutrients and do this every week. Once with nutrients and next time without and so on.
 
GroBud

GroBud

Well-Known Member
Never does runoff not mean anything. Lol I grew solely off runoff readings for a couple years. I wouldnt add anymore lemon juice growing in borderline organic you need your beneficial bacteria, lemon juice kills it. Just water with a lower ph, a little above 7 isn't awful. Your issue favours potassium deficiency. Personally everything sounds right growing organically you shouldnt have to ph at all. Peat moss has a ph of 3 to 4.5, I would want to make sure my ph pen is calibrated correctly.
 
C

CannIHarvestit

Member
myke said:
No worries,checking runoff ph means nothing.Whats your water pH?
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Hummm nice. Tap water is around 7. And yeah, maybe i added too much ewc. But from now on, just water with little bit apple vinegar. Besides that, everthing ok

Just added some ashes for K and P. Wish them good look :)
 
myke

myke

Well-Known Member
CannIHarvestit said:
Hummm nice. Tap water is around 7. And yeah, maybe i added too much ewc. But from now on, just water with little bit apple vinegar. Besides that, everthing ok

Just added some ashes for K and P. Wish them good look :)
Click to expand...
So leave it ,mines 7.2 never ph adjusted it.Let the soil do its job.If your hydro yeah adjust but organic dont waste your time.
 
C

CannIHarvestit

Member
Three Berries said:
Ashes will drive the pH up. Sulfur is an soil acifier.

Wood ashes are very alkaline, with pH levels of around 9 to 11
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Thx ! Hope they go well. Just did the last feeding with huge mix (for experimentation also hehe) worm tea + lime + ashes + vinegar to adjust ph (around 6-7 final. 9-10 earlier to vineg). Let's pray hahaha. Next week turning to flower

I'll show the results here. Thx guys
 
Milky Weed

Milky Weed

Well-Known Member
CannIHarvestit said:
Thx ! Hope they go well. Just did the last feeding with huge mix (for experimentation also hehe) worm tea + lime + ashes + vinegar to adjust ph (around 6-7 final. 9-10 earlier to vineg). Let's pray hahaha. Next week turning to flower

I'll show the results here. Thx guys
Click to expand...
Well the darkness did not help I’m sure. Also, you tried an experimental mixture as you said, looks like you may have to tweak it.
 
PJ Diaz

PJ Diaz

Well-Known Member
CannIHarvestit said:
Hello ! Just a quick update after they stayed in the dark for about 45h, before switching 12/12 light.

Almost ALL the branches tips get dried and dead, i think.

Do you guys have any ideia of what could be happening?
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Seems like you may have had excessive nutes in the soil, and then the plant had no way to process them in the dark for so long. I think you may also be overdoing the acidity with lemon juice and vinegar.
 
C

CannIHarvestit

Member
Wow
PJ Diaz said:
Seems like you may have had excessive nutes in the soil, and then the plant had no way to process them in the dark for so long. I think you may also be overdoing the acidity with lemon juice and vinegar.
Click to expand...
Wow, that makes perfect sense. Maybe they'll go bushier, maybe this could be a new topping technique lol.

Let's see what happens. But for now on i'll not feed them anymore, unless they ask for it

The other ones leaves are a little droopy. Could be this as well, since I didn't water them for a week now
 
C

CannIHarvestit

Member
Milky Weed said:
Well the darkness did not help I’m sure. Also, you tried an experimental mixture as you said, looks like you may have to tweak it.
Click to expand...
Yeah, agreed. Maybe too much nutes before they need them

I was puzzled on what could be the causes of smaller leaves, since in the beggining they were like 3" long, and now about 2". But in this bigger one i have almost 40 branches. Lucky if each gives me 1g haha
 
C

CannIHarvestit

Member
CannIHarvestit said:
Wow

Wow, that makes perfect sense. Maybe they'll go bushier, maybe this could be a new topping technique lol.

Let's see what happens. But for now on i'll not feed them anymore, unless they ask for it

The other ones leaves are a little droopy. Could be this as well, since I didn't water them for a week now
Click to expand...
Maybe it'd be good to do some flushes? Because now they're sleeping 12h instead of 3-4h .. any thoughts?
 
zeem

zeem

Well-Known Member
I was going to make a joke; saying that you should add more worms and a praying mantis. But cyberspace is an irony-deficient medium so without explanation you might just think I am a prick instead of trying to help. Tho, the epression represents my sentiment that you should be doing far less. Like the phrase: "Say less." You should do less to your medium.

After reading about cannabis growing problems for 14 years... enduring my own misguided efforts interpreting what I read on forums; repeatedly learning that I was using too much nutritional additives... I have come to the conclusion that nobody can really provide exact advice about what specific pH your medium should be. Every medium is different. I postulate that every strain in a different medium will require differing inputs when compared to another medium. One person's coco medium may likely not be the same as another person's coco medium.

In my case, I had the impression that if you use coco you should run the pH at hydroponic level compared to soil (due to peat and the characteristic electrical conductivity of soil). Finally, I stopped obeying the forums and started "reading" or "listening" to my plants while making single adjustments at a time. The first thing to adjust is LESS NUTES and second is cowbell. The cowbell is the pH.

Focus on getting the pH right for your specific collection of variables (medium, cultivar, water/mix). If the pH ain't right then the plant can't drink well nor can it feed well; meaning that the plant cannot absorb the nutrients at the appropriate ratios, if at all. Get it right for your combination of medium and cultivar. My entire grow became productive when I stopped running my pH like hydro and ran it like soil. I've only grown one cultivar, ever. After realizing I had to run it like soil pH, then I had to dial it in for my particular stuff until the petioles were rising up in the morning at a 40° angle and then drooping at night just before the lights turned off; letting me know they were done for the day.

HTH!
-z
 
C

CannIHarvestit

Member
CannIHarvestit said:
Wow

Wow, that makes perfect sense. Maybe they'll go bushier, maybe this could be a new topping technique lol.

Let's see what happens. But for now on i'll not feed them anymore, unless they ask for it

The other ones leaves are a little droopy. Could be this as well, since I didn't water them for a week now
Click to expand...
And yeah, it had this "topping effect" in the plant! Look at those 'multi-little-colas' after nutrient burn, in response to 45h dark before flowering
 

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