Calcium def not going away w/ calmag?

[Arthur]

Soil ph check... if you haven't been phing thru the grow, your medium could have drifted. Could have just drifted due to breakdown of the peat etc...

Soil test, either with a soil ph meter, or slurry test.
Your girls look to be in about the right time frame to see a medium drift for just these reasons.

My 2 cents.

 

[Odissey]

When you zip tent its sucking walls in and smothering the fans causing them to sweat.

I have not noticed any sweat though

 

[Odissey]

Soil ph check... if you haven't been phing thru the grow, your medium could have drifted. Could have just drifted due to breakdown of the peat etc...

Soil test, either with a soil ph meter, or slurry test.
Your girls look to be in about the right time frame to see a medium drift for just these reasons.

My 2 cents.

I see. I will try it out. Thanks for the suggestion! If the soil is at a different ph than it sould, how should I approach it? Water with higher/lower ph to correct it or?

 

[Arthur]

Depends on what you use for up and down, if the ph is off I'd suspect slid down. Do both pH and ppm. If your using just a standard ph up and down, then amending the soil would be appropriate as the bases and acids in ph up and down don't stick around in the medium.
I use Olympus up, it's a limestone based ph up, the limestone stays in the medium and helps buffer things.

 

[Odissey]

Ok so I have not measured soil ph yet, as thr soil is still wet and I do not want to over water. However, there are multiplr problems with the plant right now, even though the buds are fattening up nicely. 1) The lower shaded leaves are completely yellow, is this N def. or just a consequence of not receiving light? Should I remove them? 2) on ther other hand, I still see some kind of claw and some leaves' tips are slitghly burnt so I guess its not def. 3) the calcium def. does not seem to be going away. Should I flush the plant?
Here are some photos of what I mean:

 

[Waira]

- feeds have been light, I'd say you P-K hungry for starters,.. problem is when you cut down on the nutes to reduce the N, you short on everything else,... I don't think this is a Ca issue, P defc. can look a lot like it sometimes... the yellowing, larger patches of necrosis hint at this, and demand is high now,... I hear you on the damn 4-0-0 Ca-Mg! Look for alternative products, plenty out there with low N, 1-0-0 is fine,.... that said, I'd lay off the Ca-Mg for now,....
....pH is always in the possible mix here, but with no measurement it's a gamble on what to do next; off pH can lock out nutes, and if you feed in that situation, matters will get worse, not better,... heavy Ca-Mg use, plus hard water can start an overload of sorts of nute ions, which can also lock things out,....
... lowers are fading from mostly normal tapping out for this stage,... N and P are mobile so that's part of it,....
AN pH perfect really only applies to it being in solution, not once in the soil so much, too many other influencing factors there, and I think AN recommends RO/Di water use with their product... basically, your input pH is not reflective of the actual in-pot pH,... So, how to check with no pH probe,... run-off is not a good measure at all, even the improved method listed in the colored section above this one is iffy,... but in a pinch it'll do,. even a straight, unadjusted RO/Di water to about 15% pot volume run-off can give a crude ball park estimate; if it's in say, the low 5's, that tells us the pH is way off regardless of the exact figure, and corrections need to be made,... understood about the concern for waterlogging the pot... longer term it can smother the roots starve them for O2 and damage them... But you can speed draining and drying of the pot by placing some paper towels on top of a small stack of newspaper, making good contact with the underside of pot.. this will start a wicking action that will help speed removal of the excess water faster,....

 

[Odissey]

- feeds have been light, I'd say you P-K hungry for starters,.. problem is when you cut down on the nutes to reduce the N, you short on everything else,... I don't think this is a Ca issue, P defc. can look a lot like it sometimes... the yellowing, larger patches of necrosis hint at this, and demand is high now,... I hear you on the damn 4-0-0 Ca-Mg! Look for alternative products, plenty out there with low N, 1-0-0 is fine,.... that said, I'd lay off the Ca-Mg for now,....
....pH is always in the possible mix here, but with no measurement it's a gamble on what to do next; off pH can lock out nutes, and if you feed in that situation, matters will get worse, not better,... heavy Ca-Mg use, plus hard water can start an overload of sorts of nute ions, which can also lock things out,....
... lowers are fading from mostly normal tapping out for this stage,... N and P are mobile so that's part of it,....
AN pH perfect really only applies to it being in solution, not once in the soil so much, too many other influencing factors there, and I think AN recommends RO/Di water use with their product... basically, your input pH is not reflective of the actual in-pot pH,... So, how to check with no pH probe,... run-off is not a good measure at all, even the improved method listed in the colored section above this one is iffy,... but in a pinch it'll do,. even a straight, unadjusted RO/Di water to about 15% pot volume run-off can give a crude ball park estimate; if it's in say, the low 5's, that tells us the pH is way off regardless of the exact figure, and corrections need to be made,... understood about the concern for waterlogging the pot... longer term it can smother the roots starve them for O2 and damage them... But you can speed draining and drying of the pot by placing some paper towels on top of a small stack of newspaper, making good contact with the underside of pot.. this will start a wicking action that will help speed removal of the excess water faster,....

Thanks a lot for the detailed answer Waira! I will flush and measure ph when I get home and then feed as usual without the calmag I will update soon!

 

[Odissey]

So I tried flushing with 3x the amount of water I usually give her, and then fed as usual without the calmag. The runoff ph was 6.3 so I guess the ph is fine? The plant is not getting better though and the rusty spots are now spreading to the upper leaves. I have no clue whats going on and at this point I think I will just have to accept it and try to run with it until the harvest. What do you guys think?

 

[rick-j]

So I tried flushing with 3x the amount of water I usually give her, and then fed as usual without the calmag. The runoff ph was 6.3 so I guess the ph is fine? The plant is not getting better though and the rusty spots are now spreading to the upper leaves. I have no clue whats going on and at this point I think I will just have to accept it and try to run with it until the harvest. What do you guys think?

Morning Odissey, just a quick pic that might cheer you up a bit. My previous grow's with tang's easy grow, same nute's, LED's, but I was way underfeeding, lot's of other bad stuff, long story. I ask for help about 5 wk's into flower--the main help came from Waira, it was hard for me to understand some of the language at first, but I managed to get some half way decent smoke with all my mistake's. Hang in there--- it's a much better hobby when you have some good help, wish this rookie could help more, good luck-----

 

[Odissey]

Morning Odissey, just a quick pic that might cheer you up a bit. My previous grow's with tang's easy grow, same nute's, LED's, but I was way underfeeding, lot's of other bad stuff, long story. I ask for help about 5 wk's into flower--the main help came from Waira, it was hard for me to understand some of the language at first, but I managed to get some half way decent smoke with all my mistake's. Hang in there--- it's a much better hobby when you have some good help, wish this rookie could help more, good luck-----View attachment 1032947 View attachment 1032948

Hi Rick! Thanks for your kind words. Your plants seem to have experienced the exact same problem as mine. What did you do to cope with it? I have had a couple of very sucessful grows, but this one I just simply can not figure out