HELP, Red stems, yellow leaves and brown spots!

[Jroc15]

Week 5 of flower. 70/30 coco mix. Nutes are GH trio.

At first I thought this was a nitrogen deficiency then maybe a potassium but basically the leaves start getting lighter in color and then the brown spots start to form. All of the effected leaves have purple/red stems.

I have been adding calmag once every week to feedings. So I didn't think it'd be a magnesium deficiency causing the stems to turn red. My ph is always around 5.8-6.0 going in and very close to the same in runoff so I also don't think it's a pH issue.

 

[the rrock]

What strain are you growing?

 

[Grownsince95]

What's your water source? Have you measured it before adding nutes? How much ppm are you feeding now? Are you watering until runoff every time?

 

[Jroc15]

What strain are you growing?

Original skunk photo

 

[Jroc15]

What's your water source? Have you measured it before adding nutes? How much ppm are you feeding now? Are you watering until runoff every time?

Declorinated tap, my ppm is below 200 from tap. Runoff I feel is harder for me to gauge being there are some dry areas that allow the water to come out the sides of the fabric pot. I've thought about taking it out and dunking it thought maybe due to the dry pockets there could be a calcium buildup issue? I thought I heard someone say something about that could happen. So typically yes when I water which at this point its around a gallon every 3-4 days there's about 1000ml of runoff.

 

[Grownsince95]

I wouldn't let the coco dry out that much between waterings. Coco can stay relatively wet all the time and does not have to be dried back like soil. It's physical structure allows it to retain air even when fully saturated. I'm going to guess those dry patches are a big part of the problem.

What's the runoff ppm compared to the input?

 

[cannafarmer420]

Week 5 of flower. 70/30 coco mix. Nutes are GH trio.

At first I thought this was a nitrogen deficiency then maybe a potassium but basically the leaves start getting lighter in color and then the brown spots start to form. All of the effected leaves have purple/red stems.

I have been adding calmag once every week to feedings. So I didn't think it'd be a magnesium deficiency causing the stems to turn red. My ph is always around 5.8-6.0 going in and very close to the same in runoff so I also don't think it's a pH issue.
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Good luck, I don't do coco, but other peeps will come help

 

[Jroc15]

I wouldn't let the coco dry out that much between waterings. Coco can stay relatively wet all the time and does not have to be dried back like soil. It's physical structure allows it to retain air even when fully saturated. I'm going to guess those dry patches are a big part of the problem.

What's the runoff ppm compared to the input?

Yea I agree, my watering/feeding have been very inconsistent, I'll think I have another day and then come home to a completely wilted plant. The last time I fed my runoff was 1004 with nutes, I didn't test input. Previous readings without nutes have been all over the place, I've had one as low as 300's and another in the 800's with just tap. I'll check the input at my next feed and only water to a slight runoff to get a better read on it.