Mg def? P def?

To me alot of the symptoms look too similar for me to pinpoint it.
Anyone with knowledge able to pinpoint it? The brightening of leaves and whatever other symptoms you notice.
The red stems I believe is from my leds, but can also be P def?

1/2 strength calmag (though I think mg % in it is kinda low)

1.5/4 strength base veg

Growing in coco

If its a mg def, can i use epsom salt? Using mineral hydro nutes

Did you treat you Coco prior to planting?
This is a lesser discussed issue with Coco as it is chalk full of free cations that bind to Cal,Mg and P (this one the most).

Interveinal chlorosis you have I believe to be a Mg issues.
I would bet a box of timbits that your Ph is also messed up as well.

Good luck! I hope you harvest immense buds.

Dabbie McDoob said:

Did you treat you Coco prior to planting?
This is a lesser discussed issue with Coco as it is chalk full of free cations that bind to Cal,Mg and P (this one the most).

Interveinal chlorosis you have I believe to be a Mg issues.
I would bet a box of timbits that your Ph is also messed up as well.

Good luck! I hope you harvest immense buds.

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Yes double buffered it.
My pH is probably a bit too high atm gonna feed today with lower pH(it rises).
So a tbspoon of epsom salt per gallon would prob fix my issue?

Thank you I hope so too!

What you should be doing is feeding every day, at least once to full saturation and a good bit of run off.
Ph5.7-6.3
Veg nutes at 250- 300ppm.
If you're using tap water you shouldn't "need" any extra calmag at this point but 50ppm won't hurt them. Helps balance ph too.
If using r/o water you definately need 50-100ppm calmag ontop.

However you're varying from that is the issue.
Doubt it's actually a deficit though.. Usually when you see this it's ph lockout caused by not watering enough.

EvilScotsm@n said:

What you should be doing is feeding every day, at least once to full saturation and a good bit of run off.
Ph5.7-6.3
Veg nutes at 250- 300ppm.
If you're using tap water you shouldn't "need" any extra calmag at this point but 50ppm won't hurt them. Helps balance ph too.
If using r/o water you definately need 50-100ppm calmag ontop.

However you're varying from that is the issue.
Doubt it's actually a deficit though.. Usually when you see this it's ph lockout caused by not watering enough.

Click to expand...

Forgot to mention that I use hempy buckets. Does this alter how much I have to feed? Approx 3 liters res( last 2 inches in my buckets).

I'm using tap that measure 0.07ec.

I've been feeding 0.85 ec (400-500ppm) so guess I have to turn it down a notch. But 1/3 of the ec is just my calmag alone.

Destroyer of chairs said:

Forgot to mention that I use hempy buckets. Does this alter how much I have to feed? Approx 3 liters res( last 2 inches in my buckets).

I'm using tap that measure 0.07ec.

I've been feeding 0.85 ec (400-500ppm) so guess I have to turn it down a notch. But 1/3 of the ec is just my calmag alone.

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I've done hempys a few times. I feed every second day with those no worries. Res at the bottom holding about 3 litres.
500ppm is a little high but not high enough to cause any damage.
You're not letting the pots dry out are you? They should still be pretty heavy when you feed them again.

EvilScotsm@n said:

I've done hempys a few times. I feed every second day with those no worries. Res at the bottom holding about 3 litres.
500ppm is a little high but not high enough to cause any damage.
You're not letting the pots dry out are you? They should still be pretty heavy when you feed them again.

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No sir they are still heavy and top layer is barely showing hints of lighter brown 5% of surface area.

Ok i water them every 3rd day but maybe I should make it every second day then.

If you'll foliar spray with Epsom for a few days and they green up....you know what you need to do (provided your pH is in check). Good luck

CannaCountry said:

If you'll foliar spray with Epsom for a few days and they green up....you know what you need to do (provided your pH is in check). Good luck

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Never foliar sprayed anything with anything. I'll read up on the topic thx for tip.