Deficiencies Again...Ugh

Cannabinoid Froyd

Well-Known Member
Grabbed a cheap 3way soil probe.

She was fed late yesterday. Readings this morning:

Moisture - 9 out of 10
Less than 6PH at about 5.8 or so. (acidic)

That is about all I can do.

What would be the suggested fix for such a low PH & is this a PH lockout?
 

Budzbuddha

Well-Known Member
Let’s get some better info on Fox Farm horror show….

FF soil - ocean forest ? Strawberry fields ?
FF nutes - “ Trio “ ? … Cultivation Nation ?

First … those cheap green soil probes do nothing .
Get proper tools - PPM / TDS pen & PH pen .
You can even get PH test drops ( GH ) so that way you can “ eliminate “ the non problem areas.

FF soil can run on tap water - so that pretty much solves the Cal Mag in most municipal water sources.
FF soil ( ocean ) is nute charged and can feed that plant alone by simply recharging it with new soil ( top dress or made as a tea ) …… it literally says it on the bag !

FF soil tends to run 6.3 ish out of bag - there are some variations in mix according to your local regions as i hear some bags are “ dirtier “ ( odd shit thrown in ) than other areas. FF TRIO is some very basic shit - Heavily concentrated so a little goes a long way. It is best to look at Trio line as a 2 part nute with a myco feed.

Gro Big - Veg nute
Tiger Bloom - Bloom
“ Big Bloom “ - NOT A BLOOM product in spite of
name. It is a very mild mix of micronutrients for the medium and will not carry a plant “ by itself “.

Your plants are correctable- Not extreme. Correct / Monitor what PPM / EC / PH going into plant. Sometimes the buffering of original potted medium starts to exhaust which can allow uptake to drift.
PH your water / feed to 6.5 to 6.7 . No Runoff checks - No BSM - No BS
 

Cannabinoid Froyd

Well-Known Member
Soil = F.F.O.F.
F.F. Nutes = Tiger Bloom, Bush Doctor Cal/Mag. Did use FF Bush Doctor Kelp Me Kelp You during Veg stage but stopped after realizing it didn't need it.

The only reason I fed it is because it looked hungry and I had no way of testing ppm/ec.

I do have a Apera20 PH tester to test my input and have NEVER had a reading less than 6.5
6.8-7.2 nominally. Only when I mixed a gal of 2/3 dose of Tiger Bloom did I notice my tap going from 7.4/7.6 to 6.5/6.7

The Apera does require calibration and quite possibly could have been giving me a bad reading and it has been about a month since last calibration. Just didn't seem like it was requiring a calibration as it read my tap accurately from a month ago to today.

As for a PPM/TDS pen I am poor a.f. Any help there would be greatly appreciated. (Links)
 

ProPheT 216

Well-Known Member
All your leaf tips are down indicating your nutrient problem is likely from to high of a charge. You probably need less not more. Your plant may be drinking water and ignoring food because it ppm is 2 high. When that happens the problem gets worse. Less water same nutrients so ppm goes up even higher. Also if the nutrients are not being taken up as soil dries you basicly have salts left from nutrients. Those salts 1 are in the way of the plant eating. 2 they will partially re-dissolve but be locked up with other things and still not be available to the plant affecting the ec/ppm of anything you feed.

Google slurry test and test your soil ph
 
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Bukvičák

Well-Known Member
Grabbed a cheap 3way soil probe.

She was fed late yesterday. Readings this morning:

Moisture - 9 out of 10
Less than 6PH at about 5.8 or so. (acidic)

That is about all I can do.

What would be the suggested fix for such a low PH & is this a PH lockout?
I was wondering about what kind of cheap ppm soil meter you were talking about. And you were talking about pH/moisture meter. You wont get reliable measurements out of this thing, so forget about pH for some time. What about your source water? Is that calmag necessary? You might be locking out magnesium and potassium with excesive dose of calcium… BTW flushing your peat based medium will only cause leaching your lime away leaving even more acidic medium behind.
 

Cannabinoid Froyd

Well-Known Member
All your leaf tips are down indicating your nutrient problem is likely from to high of a charge. You probably need less not more. Your plant may be drinking water and ignoring food because it ppm is 2 high. When that happens the problem gets worse. Less water same nutrients so ppm goes up even higher. Also if the nutrients are not being taken up as soil dries you basicly have salts left from nutrients. Those salts 1 are in the way of the plant eating. 2 they will partially re-dissolve but be locked up with other things and still not be available to the plant affecting the ec/ppm of anything you feed.

Google slurry test and test your soil ph
Ran a slurry test. 1/1 ratio tap water to soil
AperaPH20 pen, calibrated for weeds sake
Solution sat for 3-4min

Results: PH 6.7

Edit: Soil sample taken from 2"-3" down, tap was PH of 7.4 before slurry.
 

I'm negan

Active Member
Calcium deficiency is the most over diagnosed problem lol. Calcium is an immobile nutrient. That means it will first appear in the very newest growth. There is no deficiency that I'm aware of that causes those brown spots on older leaves like that. In my opinion it is blight. Either from disease/pathogen/fungus/insect. Also there is some clear nutrient deficiency that you would expect in older growth such as magnesium and phosphorus.
 
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Cannabinoid Froyd

Well-Known Member
Calcium deficiency is the most over diagnosed problem lol. Calcium is an immobile nutrient. That means it will first appear in the very newest growth. There is no deficiency that I'm aware of that causes those brown spots on older leaves like that. In my opinion it is blight. Either from disease/pathogen/fungus/insect. Also some clear nutrient deficiency that you would expect in older growth such as magnesium and phosphorus.
It is on my uppers.20220212_123802.jpg
 

Cannabinoid Froyd

Well-Known Member
They also had this same problem when they were just going into flower. What you are likely seeing are the grown version of the young leaves that were affected 5 weeks ago.
 

I'm negan

Active Member
I still stand by my diagnosis. Those leaves are not new growth. Very common blight. You'll see the same thing in tomatoes. Calcium is directly involved in fruit production and cannot be transported from the lower leaves to help the new growth. You would see it in your buds if it was truly calcium deficiency.
 

Cannabinoid Froyd

Well-Known Member
I still stand by my diagnosis. Those leaves are not new growth. Very common blight. You'll see the same thing in tomatoes. Calcium is directly involved in fruit production and cannot be transported from the lower leaves to help the new growth. You would see it in your buds if it was truly calcium deficiency.
Fucking great. I have noticed some gnats or Flys at the soil level. Overwatering?
 

I'm negan

Active Member
Fucking great. I have noticed some gnats or Flys at the soil level. Overwatering?
I've never grown it soil bro so i can't really call it on the over watering. But if its a disease you have to throw out that soil and sanitize everything hardcore and hope it doesn't come back. I'm not saying its a disease, but it could be. Theres a hundred things that it could be. I saw a guy on YT who's plants started to look like that and he realized ot was because he accidentally fed them bleach.
 

Cannabinoid Froyd

Well-Known Member
also i still think everyone is right that they're underfed... And cal-mag definitely isnt going to hurt. What's your RH?
RH 45 Temp 78F

It does get as hot as 81F midday and as low as 71F at lights off early morning. I usually go in and turn the heater down to keep the temp at around 78F during the day and turn it back up at night to keep it in the low 70's.
 

Cannabinoid Froyd

Well-Known Member
Last year all I had to do was water with tap and I was golden up till about week 6/7. Then I dealt with a slight deficiency. Nothing like this damn mess. Treated this grow same as last year. Not a clue wtf changed other than feeding bsm water and using mykos. If anything, the environment has become better.
 
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