Can't seem to get it right

coreywebster said:

What lighting are they under?

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some run of the mill LED strips, full spectrum. I put my expensive light in flower room

https://www.sunblasterlighting.com/our-products/grow-lighting/led-strip-lights/

kuruth said:

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.

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Are you PHing your water before you add your additives and nutrients?

No - my nutrients+3ml of PH brings it to the right spot. I always do calmag, then coco A, then Coco B, then superthrive, then hydrozyme, then PH down.

I applied the foliage spray. Is this a one time thing? Or a daily thing? In the case that it is Mag deficiency, how long until I should start to notice?

Bernie420 said:

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

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Thanks.

That doesn't look like mg def to me, but good luck on this. You have to ask yourself if the canna fert has mg in it already, what are the odds it's mg def? Pretty small I'd say. I don't use canna so I have no clue. Good luck.
Edit: I just went back to your fert post and saw you're giving calmag. The odds of mg def just got a lot smaller.

kuruth said:

some run of the mill LED strips, full spectrum. I put my expensive light in flower room

https://www.sunblasterlighting.com/our-products/grow-lighting/led-strip-lights/

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Cool, I only asked because intense LEDs too close can cause all sorts of problems that present themselves as various other issues and can have folk running round thinking they have any and all deficiencies.
I doubt that's the case having seen your lighting unless your running shit loads real close.

Looking at the canna chart it looks like your feeding 100%, I would cut nutrients down to 2 thirds strength.
I would treble check ph with a different test kit or pen and make sure your root zones not cold (like say a tiled or concrete floor)
I have grown with canna line for years and never had a plant look like that.

kuruth said:

I applied the foliage spray. Is this a one time thing? Or a daily thing? In the case that it is Mag deficiency, how long until I should start to notice?

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should notice in a day or two and its not a one time thing every few days at a low ppm. at least three times is what I recommend and then re-evaluate what it looks like as far as the foliar feeding is going. or if you added a little mag at the roots then do it at least two times then re-evaluate.

thinks its a cross between k and mag deficient.

coreywebster said:

Cool, I only asked because intense LEDs too close can cause all sorts of problems that present themselves as various other issues and can have folk running round thinking they have any and all deficiencies.
I doubt that's the case having seen your lighting unless your running shit loads real close.

Looking at the canna chart it looks like your feeding 100%, I would cut nutrients down to 2 thirds strength.
I would treble check ph with a different test kit or pen and make sure your root zones not cold (like say a tiled or concrete floor)
I have grown with canna line for years and never had a plant look like that.

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We must be looking at different charts, I am running it at like 50% I think. Here is the schedule Canna has for me.(picture below)
It suggests: 35ml of Canna A and 35ml of Canna B per 4 gallons. I've been adding only 15ml of each, and just upped to 20ml of each today.

I checked my PH. I calibrated both my pens and used drops, i'm certain that at least now my PH is on point - however I suspect it was
never far off.
My pots are suspended on a rack about one foot above the floor, so most likely not cold root zone.

But on your first point, these plants are extremely close to the LED lights, but they had been my last 2 veg rounds without any issues. I'll raise lights a bit, to be sure.
(fingers crossed that this is the problem - easy fix )

I'll be applying my third foliage spray tonight, at low ppm for Epsom salts - however I haven't really notice a change in either direction.

Bernie420 said:

should notice in a day or two and its not a one time thing every few days at a low ppm. at least three times is what I recommend and then re-evaluate what it looks like as far as the foliar feeding is going. or if you added a little mag at the roots then do it at least two times then re-evaluate.

thinks its a cross between k and mag deficient.

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I upped my overall nutes slightly. I'll do a third spray of Epsom water solution tonight, I mean it's not really getting worse so that's a good thing.
I'll be patient and wait a few days and see if anything changes. Thanks again.

Hey I just wanted to follow up and thank everyone that helped me. You guys were spot on, it was Mag+Potassium deficient, also it was a little heavy on N.

They are looking healthy and I took some cuttings and switched them to flower today, have a look:

Also, they are going to be too big for my flower room I think. I'm going to use a scrog net to try and keep them down.

If I just cut off all the current tops, will the lower branches fill out and become new ones? Or will it like shock and kill my plant?