Calcium but maybe other issue as well

Joined
Dec 5, 2016
Messages
41
Reputation
0
Reaction score
143
Points
0
It's been smooth sailing until a few days ago. I'm starting to notice spots that look like a calcium deficiency but I've given them CALiMAGic the past two waterings. 3 days ago I gave 1 tsp Big Bloom, 1 tsp Tiger Bloom and 1 tsp CalMag per gallon of pH 6.5 water (pH'ed after adding). Some of the pots didn't feel super light but they took 3/4 of a gallon in a 5 gallon pot before there was a little run off. This morning I saw the spots and discoloration looked a little worse so I have them pH 6.5 water with 1 tsp CalMag.

Soil: Fox Farms Ocean with 1/3 perlite
5 gallon pots


NOTE: The past two days we had the power go out 3 times momentarily and when the power came back on my variable fan controller was not set high enough so the lights came on but not my carbon filter fan which keeps the tent cool didn't. The temps got to 92F and the humidity was 75. One time it may have been for 2 hours they were baking in the heat. I thought I'd mention this in case it looked like heat stress on any of them.

Below is my 00 Seeds Auto Bubblegum. It's getting close, maybe a week or two with some of the trichomes clear, most cloudy and very few amber. The spots look like calcium deficiency but I've given it CalMag the past two waterings. Maybe I'm just be impatient but it seems the spots are getting worse in the new bud area.

View attachment 691169

View attachment 691170

00 Seeds Auto Chocolate Skunk - this looks like calcium deficiency as well.

View attachment 691171


View attachment 691172

Pyramid Seeds White Widow - The new tops are light colored and not looking good.

View attachment 691173

Thank you very much for any help with these problems!!


Sent from my iPad using Tapatalk
 
What kind of light and how close? WW looks light bleached to me.
 
I have 2 Mars Hydro 300 LEDs closer to the front of the tent 16" from tops and 4 60watt CFLs in the back of the tent 3" away. The White Widow was near the back of the tent and got more CFL light. There are calcium deficiency spots on the white widow as well. I've backed the lights away from the white widow a little bit just in case.

What kind of light and how close? WW looks light bleached to me.




Sent from my iPad using Tapatalk
 
I've burned leaves like that using tiger bloom it's strong for autos, I bet it takes a bit of ph up to get that water back up lol. I'll bet your runoff is very high ppm, so it could be nute burn, I'd wait for @Waira to respond though.
 
Thank you. Yeah I have to add a lot to get the pH back up.

I've burned leaves like that using tiger bloom it's strong for autos, I bet it takes a bit of ph up to get that water back up lol. I'll bet your runoff is very high ppm, so it could be nute burn, I'd wait for @Waira to respond though.




Sent from my iPad using Tapatalk
 
I can see signs of Mg def, those leaves with whiteish color between normal green colored veins. I am not sure what is happening up on the buds. For a def to show up on the newer leaves, it has to be an immobile element. It looks more along the line of some type of bacterial or fungal spotting. I had a boron deficiency that looked kinda like that. Turned out that my 2 part base nutrients did not deliver enough micronutrients when diluting down for use with autoflowers. Happened every time for several grows in a row before we figured out what was happening. I started supplementing with Earth Juice MicroBlast and the problem disappeared on all subsequent grows.
 
:d5: HM, reading my mind again! I'm with you bud, I see micronute's issue's mostly, maaaaybe some P defc., or Ca in "disguise"...

:toke: kraig-- strong yellowing at the very tops is usually an Fe or Zn defc. happening, and I see it in all of them, WW has the worst case of the lot... BBG spotting is another symptom, hard to be sure when multi-defc. are happening, it muddies the diagnostic waters! but likely Ca or P related, though other much more rare (micronute) defc.'s can show similar spotting,... CSkunk looks P related mostly,... That heat spell didn't help for sure! So, are you pH adjusting your water and nute soln.? Do you have means to measure the actual in-pot pH, like a good quality soil pH probe? I strongly suspect off-pH in the pots here,.. With most all the micronutrients, they are immobile within the plant, and become locked out quickly by high pH,... low pH usually isn't a problem-->
soil.jpg
...
So, the fix is going to depend on that soil pH mate, though HM has recommended the right stuff for fixing this--after the soil pH is corrected! If it's off enough, and the nutes are locked out, adding more will likely make matters worse, not better! I hate to suggest it during bloom, but one way to deal with this, bypassing the root zone altogether is foliar spraying,.. it's the fastest way into the plant too! BUT the right tools for the job are needed, and techniques,... a wetting agent must be used to make sure things get coated evenly and it sticks long enough to get absorbed, instead of beading up and rolling off,.. top and bottm sprayed, leaves only as much as possible,.. away from direct intense light until dry, well before lights out to avoid potential mold issues,... And last but best would be to use Optic Foliar's Transport in conjunction with Earth Juice MicroBlast, or OverGrow,.. Transport negates the need for wetting agents, as this stuff allows temporary penetration of nute's into the leaf right through the otherwise impermeable cuticle layer... it works fantastically, trust me! .. As for the soil pH, last choice for checking is the run-off method and calculation, which done right will give a middling accurate reading, done wrong it gives shite! -- here's a link-(https://www.autoflower.org/threads/...-for-run-off-testing-and-ph-estimation.41733/ )
 
Thank you very much! I really appreciate you taking to give such an in-depth diagnosis. I don't have a soil pH tester but it's on my list. I will pick up some Earth Juice MicroBlast today. I have been giving them Microbe Life Plus-C most waterings but I don't think I've added it in the past 2 or 3 which may have made the problem worse. I'm definitely following your advice and will check the pH with the runoff method until I get a good soil pH tester. I have been mixing nutes then bringing the water to exactly 6.4 or 6.5 every watering. I water till I get about a cup of run-off on my 5 gallon pots.

Thanks again Waira!!


:d5: HM, reading my mind again! I'm with you bud, I see micronute's issue's mostly, maaaaybe some P defc., or Ca in "disguise"...

:toke: kraig-- strong yellowing at the very tops is usually an Fe or Zn defc. happening, and I see it in all of them, WW has the worst case of the lot... BBG spotting is another symptom, hard to be sure when multi-defc. are happening, it muddies the diagnostic waters! but likely Ca or P related, though other much more rare (micronute) defc.'s can show similar spotting,... CSkunk looks P related mostly,... That heat spell didn't help for sure! So, are you pH adjusting your water and nute soln.? Do you have means to measure the actual in-pot pH, like a good quality soil pH probe? I strongly suspect off-pH in the pots here,.. With most all the micronutrients, they are immobile within the plant, and become locked out quickly by high pH,... low pH usually isn't a problem--> View attachment 691785...
So, the fix is going to depend on that soil pH mate, though HM has recommended the right stuff for fixing this--after the soil pH is corrected! If it's off enough, and the nutes are locked out, adding more will likely make matters worse, not better! I hate to suggest it during bloom, but one way to deal with this, bypassing the root zone altogether is foliar spraying,.. it's the fastest way into the plant too! BUT the right tools for the job are needed, and techniques,... a wetting agent must be used to make sure things get coated evenly and it sticks long enough to get absorbed, instead of beading up and rolling off,.. top and bottm sprayed, leaves only as much as possible,.. away from direct intense light until dry, well before lights out to avoid potential mold issues,... And last but best would be to use Optic Foliar's Transport in conjunction with Earth Juice MicroBlast, or OverGrow,.. Transport negates the need for wetting agents, as this stuff allows temporary penetration of nute's into the leaf right through the otherwise impermeable cuticle layer... it works fantastically, trust me! .. As for the soil pH, last choice for checking is the run-off method and calculation, which done right will give a middling accurate reading, done wrong it give shite! -- here's a link-(https://www.autoflower.org/threads/...-for-run-off-testing-and-ph-estimation.41733/ )
 
Thank you! I'm picking up some Earth Juice MicroBlast today. I appreciate your help.


I can see signs of Mg def, those leaves with whiteish color between normal green colored veins. I am not sure what is happening up on the buds. For a def to show up on the newer leaves, it has to be an immobile element. It looks more along the line of some type of bacterial or fungal spotting. I had a boron deficiency that looked kinda like that. Turned out that my 2 part base nutrients did not deliver enough micronutrients when diluting down for use with autoflowers. Happened every time for several grows in a row before we figured out what was happening. I started supplementing with Earth Juice MicroBlast and the problem disappeared on all subsequent grows.
 
:smoking:you're welcome mate!.. ..just realized I missed something :doh:-- I see you're using FFOF soil.. a word of caution about them; their soils have often been testing out in the low 5's pH :nono: right in the bag! Some peep's get Ok bags, but not often,... FF is living off their old good rep' from yars ago, but the primary source of old well composted forest materials is long depleted, so now they have to monkey-fuck with it to try and accelerate this process, resulting in overly acidic undercooked shwagg,...:finger: So, point being, your soil might have been off to begin with, or not- :shrug: ..we'll see when you do a run-off test,...
 
Back
Top