Help colas turning black around the edges?

JSTU

Member
First grow. I moved lights up. Humidity set to 40 ,co2 1600, temps 80 with fans blowing over/on on medium. Someone please let me know why this is happening. I've been flushing with flora kleen since yesterday. I'm 52 days into flower. The strain is chemdawg 91.
 

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JSTU

Member
Pheno??? Purple from night time temp drops??? I doubt bud rot or blight....need more info
I was hoping it was that I dropped to 65 at night. It is only happening to the top colas mostly. I am having some leaves fall off and others with edges folding up like taco.
 

JSTU

Member
Cyanites from dramtic ppm change from flush? How does the plant feel?
The plant feels dry like paper. I started flushing after I had problems already. I didnt flush much during the last couple months. Thanks for the help!
 

JSTU

Member
15 degree change in temperature is all it takes to start turning black,blue,red,purple ect. This is all I'm seeing in your pic. Bad ass though !
Thanks a lot I should have asked earlier I was worried and flushing thought the leaves that we're getting the color on edges were going to get crispy and fall off !
 

Dr.Pecker

Well-Known Member
It might be done dude, what do the trics look like? Cold temps will do that. As far as the leaves tacoing you probably fixed that with a flush. Are you in soil? organics? what is the tds of the runoff? The more information the better.
 

JSTU

Member
It might be done dude, what do the trics look like? Cold temps will do that. As far as the leaves tacoing you probably fixed that with a flush. Are you in soil? organics? what is the tds of the runoff?
This is the taco blue OG day 52 flower. Same nutes and everything GH. Coco 3gallon air pots. I read that chemdawg takes 9 weeks I'm just above 7 not sure about the OG . Trichs seem mostly clear i think it's hard for me to tell with my microscope. I thought there were too many white pistols left to be done?
 

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Dr.Pecker

Well-Known Member
This is the taco blue OG day 52 flower. Same nutes and everything GH. Coco 3gallon air pots. I read that chemdawg takes 9 weeks I'm just above 7 not sure about the OG . Trichs seem mostly clear I think it's hard for me to tell with my microscope. I thought there were too many white pistols left to be done?
Can't really tell by pistols alone, you need the scope. I would harvest when you start seeing amber but mostly cloudy. I didn't see any white hairs on the second picture.
That taco is from your fan. Did you check that tds of the runoff?
 

JSTU

Member
This is the taco blue OG day 52 flower. Same nutes and everything GH. Coco 3gallon air pots. I read that chemdawg takes 9 weeks I'm just above 7 not sure about the OG . Trichs seem mostly clear i think it's hard for me to tell with my microscope.
Can't really tell by pistols alone, you need the scope. I would harvest when you start seeing amber but mostly cloudy. I didn't any white hairs on the second picture.
That taco is from your fan. Did you check that tds of the runoff?
Thanks for your help. I put all run off in a bucket so not sure how accurate but it reads 2000 ppm.
 

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Dr.Pecker

Well-Known Member
Thanks for your help. I put all run off in a bucket so not sure how accurate but it reads 2000 ppm.
Whats the tds of the nutrient solution you're putting in? Oh ya and whats the ph of the nutrient solution?
 

JSTU

Member
Whats the tds of the nutrient solution you're putting in? Oh ya and whats the ph of the nutrient solution?
Tds was about 1000 sometimes more on nutrient solution. Plain water mixed in about once a week.ph 6.0-6.2 going in 5.6 to 5.8 coming out runoff.
 

Dr.Pecker

Well-Known Member
Tds was about 1000 sometimes more on nutrient solution. Most of the time with plain water mixed in about once a week.
So that means you had a little bit of build up. Now you have to figure out why the plant isn't using it. What's the ph of the solution that you're putting in?
 

Dr.Pecker

Well-Known Member
I think 6.3 is the highest for coco. I would go for 6 and up the humidity to 50 to 55% don't go higher than that
 

Dr.Pecker

Well-Known Member
My guess is too much potassium caused a lockout of something. Complete guess from some reading I did. I was a little heavy on kool bloom and bloom nutes.
You could be right. does that stuff have any calmag in it?Do you see any purpling on the stems at all? Another thing you might want to try is feed vedg nutrients for a week or two into flower. That way it wont suck all that nitrogen up at the end.
 
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