Can't seem to get it right

New grower. One full harvest under my belt, and a second one soon.

Problem with my veg plants that

4x blue cookies from seed
2x4 closet
currently in 3 gallon fabric pots
Canna Coco+Perlite
Canna A+ Canna B+ Cal-mag

PH ~5.8
room temp ~24 Celsius/77 Fahrenheit
RH ~65

I planted these "Blue Cookie" seeds 2 months ago. They have been relatively healthy the entire time
except I've never been able to get that perfect green color and healthy luster on all my leaves. I want to flower them ASAP(last week) but I really was trying to at least get a grip on if i'm over feeding/underfeeding. Or maybe over feeding one nutrient and under feeding another or causing a lockout.
(Canna is a 2 part solution that suggests adding equal parts)

I've been raising lowering ppm's over the last few weeks trying to find the sweet spot,
but I've been unsuccessful.

Current feed schedule:

1 feeding per day until atleast 20% runoff
15ml Canna A+ 15ml Canna B + 15ml Cal-Mag
~600pm Hanna meter

So what do you think ? potassium or phosphorus toxicity/deficiency?
Maybe low on N?
Some of the newer leaves are growing in pretty skinny

Here are some pics, some under natural light, some under grow lights.

What is your ppm after cal mag is added and before other nutes go in?

600 ppm overall is almost certainly not over feeding on plants that size so I'm wondering if your cal mag might be low?

I mix 4 gallons at a time.

Tap water :160 ppm
Tap water + CalMag :330 ppm
Tap water + CalMag + Canna A :480 ppm
Tap water + CalMag + Canna A+B :560 ppm

I had a few drops of Super Thrive and 10 ml of Hydrozyme, not sure how useful
they are when using salt nutrients.

Anyways, I know there are different TDS meters, Hannah reads the lowest ppm of the of the major three.

My runoff keeps coming out a little lower than what goes in, but not by much.
(off by less than 100ppm)
Which is good, because
my first Grow I had salt buildup and at least I don't have any this time.

kuruth said:

I mix 4 gallons at a time.

Tap water :160 ppm
Tap water + CalMag :330 ppm
Tap water + CalMag + Canna A :480 ppm
Tap water + CalMag + Canna A+B :560 ppm

I had a few drops of Super Thrive and 10 ml of Hydrozyme, not sure how useful
they are when using salt nutrients.

Anyways, I know there are different TDS meters, Hannah reads the lowest ppm of the of the major three.

My runoff keeps coming out a little lower than what goes in, but not by much.
(off by less than 100ppm)
Which is good, because
my first Grow I had salt buildup and at least I don't have any this time.

Click to expand...

Well that’s a good cal mag level so I don’t think I read them very well. Hope you get a better answer!

Thank you, come again.

kuruth said:

Thank you, come again.

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I thinks its a cross between k and mag deficient. Might be from watering every day roots never get to dry out any , washing away the microbe population with all the runoff. Add microbes add humic acid to your feed. give it a couple feedings of a little epsom salt also.

Thanks for the info.

Well I do have Epsom salts, so I'll add those to my feed. Roughly how much per gallon?

I've been told to keep coco wet and feed with runoff to avoid salt buildups. Seems like a Lose - Lose.

I'm going to finish these girls with synthetic nutrients, but I already bought my organic slow release nutrients for next round.

kind of unlikely to be deficient if enough fert is given, and it looks like that's being done. maybe too much. leaf tip death is usually over fert. what soil is that?

Your girl is super short on Mg...a foliar spray of Epsom should green her right up and you won't be adding additional things to your feed in the process. Just my $0.02

polishpollack said:

kind of unlikely to be deficient if enough fert is given, and it looks like that's being done. maybe too much. leaf tip death is usually over fert. what soil is that?

Click to expand...

Its just coco coir and some perlite.

Well it seems almost everyone agrees on Mag deficiency, so ill be adding epsom salts to feed or doing a foliar spray. I’ll check back in with an update in a dew days.

Thanks for the advice

kuruth said:

Well it seems almost everyone agrees on Mag deficiency, so ill be adding epsom salts to feed or doing a foliar spray. I’ll check back in with an update in a dew days.

Thanks for the advice

Click to expand...

Are you properly storing your PH pen and calibrating it?
When was the last time you checked it with the calibration solution?

Kushash said:

Are you properly storing your PH pen and calibrating it?
When was the last time you checked it with the calibration solution?

Click to expand...

I got sick of PH pens so I just started using the drops. The 5$ kit from the hydro store, do you think I should take a closer look and make sure I'm
getting proper PH readings? One thing is forsure, the PH is slightly different every feeding, but I try and get it as close to the perfect color as possible( for 5.8 PH)

I'm going to check the PH runoff tonight and see if it's something wild, good call.
What makes you think it's a PH issue?

ph fluctuations .

kuruth said:

I got sick of PH pens so I just started using the drops. The 5$ kit from the hydro store, do you think I should take a closer look and make sure I'm
getting proper PH readings? One thing is forsure, the PH is slightly different every feeding, but I try and get it as close to the perfect color as possible( for 5.8 PH)

I'm going to check the PH runoff tonight and see if it's something wild, good call.
What makes you think it's a PH issue?

Click to expand...

It was just a suspicion based on the pictures and your being a new grower, especially the last picture rr10.
The location of the leaves that are yellowing is not typical of a magnesium deficiency.
The yellowing appears to high up on the plant.

When you are doing so many things it is easy to forget to calibrate or store the probe properly.

Since you are not using a probe the question is, can you get an accurate reading with the drops.

The drops are great in my case, I use them when I do a slurry test on my soil and can get away with checking the color of the drops to see if the soil ph is in a good range but for hydro I would think you need a more accurate reading.

For hydro growers the drops are a handy tool to double check ph and compare it to a ph meter but I don't think the drops alone are the way to go.

For my first round I would check with the PH pen and then do the drops every time,
then I realized the pen was probably not needed since I know what color.it should turn.

I always mix 4 gallons at a time.

For the last 6 months
my tap water has come out at 7.2 and I need to add 3ml+ of PHdown to my 4 gallons of
water to bring the PH down to 5.8. I always check with the drops to make sure.
I aim for 5.8, it might fluctuate between 5.6-6, but nothing much further.
I'll get my Bluelabs pen back out and calibrate it and keep a closer eye on the PH.

However now I am hesitant to do a foliage spray with epsom salts..maybe I'll just add a small amount
to my next feed to be safe. If it's not Mag deficiency and I spray will cause problems?

I also didn't think it looked like mag deficiency, according to the deficiency charts I found online.

Based on my experience growing in coco; the drops will work just fine, unless you're color blind. And the reason to spray the plant with Epsom is three fold...1. you won't be goofing up your existing feed program, 2. you won't be exasperating any pH issues you may be experiencing in your coco (if this is the case) and 3. the results will be relatively immediate, if in fact it's an Mg issue like many of us suspect. And no, a foliar feeding of Epsom isn't going to hurt the plant...it's an easy way to eliminate Mg as a variable or not. NOTE: If you have the means to double check your feed pH between the drops you're using and a pH Pen; I would check just to be sure you're not way off on what you think you're doing. These are just my thoughts...but you're the grower so go with what you feel is best. Good luck.

CannaCountry said:

Based on my experience growing in coco; the drops will work just fine, unless you're color blind. And the reason to spray the plant with Epsom is three fold...1. you won't be goofing up your existing feed program, 2. you won't be exasperating any pH issues you may be experiencing in your coco (if this is the case) and 3. the results will be relatively immediate, if in fact it's an Mg issue like many of us suspect. And no, a foliar feeding of Epsom isn't going to hurt the plant...it's an easy way to eliminate Mg as a variable or not. NOTE: If you have the means to double check your feed pH between the drops you're using and a pH Pen; I would check just to be sure you're not way off on what you think you're doing. These are just my thoughts...but you're the grower so go with what you feel is best. Good luck.

Click to expand...

OK that sounds perfect then. I'll apply the foliage spray of Epsom salts. Also it was kind of looking like it could possibly be Zinc deficient, which after reading some articles is most likely caused by improper PH so I think you guys have put me on the right track. I'm calibrating my pen as we speak and looking up the right dosage of Epsom salts/gal in a foliage spray. Fingers crossed.

Thanks, again =)

kuruth said:

OK that sounds perfect then. I'll apply the foliage spray of Epsom salts. Also it was kind of looking like it could possibly be Zinc deficient, which after reading some articles is most likely caused by improper PH so I think you guys have put me on the right track. I'm calibrating my pen as we speak and looking up the right dosage of Epsom salts/gal in a foliage spray. Fingers crossed.

Thanks, again =)

Click to expand...

I think 2 gr per gallon or about 150-200 ppms for a foliar spray.

What lighting are they under?