Advanced deficiency help !!

shiva71

shiva71

Well-Known Member
Hi
Ok Ok, i know this looks really bad. 6 week old Sour Diesel in DWC. Ive just had a lot to deal with lately outside of the grow tent, some bad news from my GP, and i took my eye off the ball, i know i should have addressed it sooner but ive just had more important stuff to worry about.
Temps and RH are ok, pH seems stable around 5.8, its not swinging up or down which i dont like. Ppm, was 900 yesterday and thats dropped overnight to 820 so she is feeding. Using basic Canna Flores A+B but shes obviously missing something.
She is extremely bushy and seems to struggle getting any vertical height. Roots are fine.
So does anyone have any idea what is wrong with my girl?
Thanks in advance!
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shiva71

shiva71

Well-Known Member
furnz said:
Do you have a fan blowing on it?
What are your temp and rh numbers?
I'd double check your ph with another tool, also.
Click to expand...
Thanks. No im not using a fan at the moment. 74°f, 60% RH. My pH pen is fairly reliable. I added a bit of calmag and ppm has gone down slightly which is a step in the right direction i suppose...she still looks like crap!
 
Tangerine_

Tangerine_

Well-Known Member
shiva71 said:
Hi
Ok Ok, i know this looks really bad. 6 week old Sour Diesel in DWC. Ive just had a lot to deal with lately outside of the grow tent, some bad news from my GP, and i took my eye off the ball, i know i should have addressed it sooner but ive just had more important stuff to worry about.
Temps and RH are ok, pH seems stable around 5.8, its not swinging up or down which i dont like. Ppm, was 900 yesterday and thats dropped overnight to 820 so she is feeding. Using basic Canna Flores A+B but shes obviously missing something.
She is extremely bushy and seems to struggle getting any vertical height. Roots are fine.
So does anyone have any idea what is wrong with my girl?
Thanks in advance!
View attachment 5266550View attachment 5266550View attachment 5266551View attachment 5266552View attachment 5266553View attachment 5266554
Click to expand...
Is this a clone of real sour or a seed grow?
 
shiva71

shiva71

Well-Known Member
Tangerine_ said:
Is this a clone of real sour or a seed grow?
Click to expand...
Nah its a Humbolt SD auto. Rather disappointed shes sick like this because the last one i did grew like a dream, from seed to harvest was the best strain i ever grew so i dunno whats gone tits up this time!
 
calvin.m16

calvin.m16

Well-Known Member
I'm guessing your pH crashed for a day or two. Just a guess though. Unless your pH meter is broken how are you maintaining a 5.8 constantly? Are you using a pH doser or are you talking about your input pH not the pH of the water in the rootzone?
 
shiva71

shiva71

Well-Known Member
calvin.m16 said:
I'm guessing your pH crashed for a day or two. Just a guess though. Unless your pH meter is broken how are you maintaining a 5.8 constantly? Are you using a pH doser or are you talking about your input pH not the pH of the water in the rootzone?
Click to expand...
Lol thats an amazing how did you know that?!? Yes a few days ago my pH plummeted down to 4.1, no idea why. Did a rez change and now it's stable. I trust my pH meter although it probably needs calibrating. But yes the pH was outta whack for a few days but could that have created such ongoing damage?
Cheers!
 
calvin.m16

calvin.m16

Well-Known Member
shiva71 said:
Lol thats an amazing how did you know that?!? Yes a few days ago my pH plummeted down to 4.1, no idea why. Did a rez change and now it's stable. I trust my pH meter although it probably needs calibrating. But yes the pH was outta whack for a few days but could that have created such ongoing damage?
Cheers!
Click to expand...
Been through the same situation. Usually if its as simple as a nutrient deficiency from lack of feed strength it looks less tragic. pH tends to really beat the shit out of the plants when it goes off also it will be a sudden "wtf happened" type situation like this. pH being off for even a few hours can show visible damage to plants from what I have personally experienced.

pH below 5.0 lock out the following:
  1. Phosphorus (P)
  2. Calcium (Ca)
  3. Magnesium (Mg)
  4. Iron (Fe)
  5. Manganese (Mn)
  6. Copper (Cu)
  7. Zinc (Zn)
pH above 7.0 locks out the following:
  1. Phosphorus (P)
  2. Iron (Fe)
  3. Manganese (Mn)
  4. Zinc (Zn)
  5. Copper (Cu)
  6. Boron (B)
This is why the spotting rusting on leaves being a symptom is a tell tale sign of pH being acidic and not too high as when pH is too high Calcium is not locked out.

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Last edited:
OldMedUser

OldMedUser

Well-Known Member
calvin.m16 said:
pH below 5.0 lock out the following:
  1. Phosphorus (P)
  2. Calcium (Ca)
  3. Magnesium (Mg)
  4. Iron (Fe)
  5. Manganese (Mn)
  6. Copper (Cu)
  7. Zinc (Zn)
pH above 7.0 locks out the following:
  1. Phosphorus (P)
  2. Iron (Fe)
  3. Manganese (Mn)
  4. Zinc (Zn)
  5. Copper (Cu)
  6. Boron (B)
Click to expand...
This is a bit of wrong thinking. Being out of range is not 'locking out' various nutrients unless it's way out of range. It may make some nutes less available and others more available but it's not like the door shuts to the availability to them. That's why those bars on the chart are tapered to show how availability waxes and wanes as the pH changes.

And @shiva71 you should calibrate your pH pen fairly often as the older they get the faster they lose accuracy. Are you keeping it in storage sol'n between uses with a rinse before and after storing with a spray of RO or distilled water? Do not let it sit in pure water as that will destroy the probe. Is the reference probe, (the little stubby one), clean and white? If not hit it with a stream from a sprayer a few times and if that doesn't clean it off you should get a 2-part probe cleaning sol'n and follow the instructions to clean it properly.

Once it's properly calibrated try dipping it in the calibration fluid 24 hours later and see if it reads the pH at the calibration point dead on. If not you may need a new probe or a whole new pen. Finicky bastards but can last a long time if properly maintained.

PPM pens are a lot easier to care for but also need calibration. After use just spray the probe tips and allow them to dry before putting the cap on. If dirty you can use a small brush to scrub those without hurting them. The glass ball on the pH pen is very fragile tho so you don't want to be trying to scrub that clean.

:peace:
 
shiva71

shiva71

Well-Known Member
Thanks for replies. Shes getting worse by the day and im starting to think this is terminal. Just given her her biggest feed 1000ppm, and ive left the pH relatively high at 6.3, i was putting it quite low but that didnt help so ill try it higher. But she really is looking like shit, if i looked at the damage i would say pH, but ive just calibrated my pen which i trust, its an Essentials and im 99% sure its giving accurate readings.
Thanks for the pen tips OMU im afraid i dont do any of that i really need to start taking better care of my probes and do some of what you suggest.
Something is very, very wrong here but what is it?
Cheers!
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shiva71

shiva71

Well-Known Member
rkymtnman said:
overfeeding and now nute locked
Click to expand...
Thanks. The ppm has been dropping regularly, not by much, but arent you supposed to work on the idea that if the ppm drops you can increase the ppm? Will look into how to treat nute lock, if it can be treated.
amneziaHaze said:
a month ago you had problems where 500 was too much and you kept giving her more and more. you change ph like a crazy man one day 5.2 next day 6.3 your dwc is still not lightproof. why are you not satisfied with low amount of food?
Click to expand...
Hi AH, i think youre referring to another thread, that was a different plant (AK59) which seems to be doing better. This is my other girl, a Sour Diesel. Not wanting to be a dick but i never set my pH to 5.2, i check and adjust it everyday to somewhere between 5.8-6.3. This bucket was tending to stay low, 5.7/8 and she continued to deteriorate, so ive set it a bit higher this time to see if she likes that any better. This SD twice had a massive drop down to 4.5 ish on two consecutive days which obviously didnt help so i did a rez change and it hasnt been swinging so much lately.
Thanks
.
 
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