Help id issue with my plant

Sick Plants & Problems
1

Hi all.

So i gots a black candyland female suffering from some sort of issue.

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I am not really sure what the issue is, i cant really be sire. 3 other plants in the exact same set up seem to be doing great.

Growing in promix hp with future harvest nutes following their week by week schedule on week 4 of that schedule with added honey chrome and gro tek calmax.

Ph is between 6 and 6.5.

My guesses are that it is maybe having some issue with ph or nutrient lockout caused by a mix up when mixing water. Maybe a deficiency ?

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2

This is almost entirely on older lower growth fan leaves also i should say

3

I think you have some ph issue’s
Your ph in should be like coco 5.8-6.0
I would check your runoff numbers tds and ph and go from there.
Depending on what those numbers tell you go from there but you might need a flush.

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4

The fading makes me think nitrogen deficiency and the brown spots a calcium issue.

Maybe a pH problem because it sounds like you’re feeding actively

5

Looks like some toxicity or nutrient lockout, can you check pH and ppm in runoff so we have more data? icon_e_confused|nullxnull

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6

I was typing on the same thing mentioned by @George and I am curious if lockout is starting but I always have to take a step back and look at it like a dummy… simple things first before I get ahead of myself but I hope you have luck good vibes your way The Doc

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7

Plant is drying too much. Water/ feed more frequently.

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8

I’m with @anon84307778 calcium def , what’s causing it ? I don’t know , you would have to go thru a process of elimination to find that out : )

Do you add the calmax to the Rez first or at the end of mixing up the nutes in Rez ?

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9

Missed the coco part, not a fan and conaisseur of their products, being hydro and watching those red spots over yellow I would go for Manganese, with that high pH you miss it for sure … beer3|nullxnull

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Hydroponic pH chart

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10

I mix in 1 gallon milk jugs. I add the main nutrients first and the my booster nutes.

I can try mixing it before.

And i have a ph pen and a tds meter from vivosun and i can give those a calibration

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11

First, calcium, magnesium and iron are all harder to sustain in favorable levels for the plant to use in coco.

Initially, I was going with a manganese deficiency.
For that to be the case, the color of the veins should remain green if it were caused by insufficient levels of manganese and the veins don’t appear to be green to me, they appear darker… also, manganese affects new growth first.

The darker color of the veins, along with the mottled green/yellow leaf coloration leads me to believe that the plant may be experiencing a mild calcium/iron lockout, as well as a moderate magnesium deficiency.

A magnesium deficiency affects the older leaves first.

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