New Grower Need help with leaf discoloration and spots.

[duartemartorell]

Hi guys, the leaves on 3 of my plants are getting very strange discolouration and spots!
My set up is:
400wHPS + 2x 108w LED Grow tubes in the corners.
2x Blue Cheese & 2x Critical Jack H. all auto flowers.
Im using Janice Lights mix for soil with added Perlite on top of the one that comes with the soil. im using 9l pots.
I pH my water since the tap is 8pH and the TDM count on tap is 60ppm.
I recently changed from 24/0 to 20/4
Temperatures have been steady 25-27 Celsius
Humidity in the 60% range during veg and now I'm keeping it at 40%
I have Atami organic nutrients pack and i only fed once before pre flower, right before. And fed them once after pre flower with the designated nutrients always to the lowest recommend dosage (1ml-4ml = 1ml)
So yesterday morning spotted some leaves with black spots and starting to loose color altogether.
So i posted some pictures and i was told it was probably a Cal Mag def. since i never added any.
I used 3ml of Cal-Mag by Advanced Nutrients 4-0-0 in 1L of water and i shared around the 4. plants.
This morning the leaves look worse and it seems to be moving up the leaf discolouration, that leads me to think N-P-K.
Any advice is welcome, i really want them to be full strength for the flower push.

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[witchyhour]

Hi guys, the leaves on 3 of my plants are getting very strange discolouration and spots!
My set up is:
400wHPS + 2x 108w LED Grow tubes in the corners.
2x Blue Cheese & 2x Critical Jack H. all auto flowers.
Im using Janice Lights mix for soil with added Perlite on top of the one that comes with the soil. im using 9l pots.
I pH my water since the tap is 8pH and the TDM count on tap is 60ppm.
I recently changed from 24/0 to 20/4
Temperatures have been steady 25-27 Celsius
Humidity in the 60% range during veg and now I'm keeping it at 40%
I have Atami organic nutrients pack and i only fed once before pre flower, right before. And fed them once after pre flower with the designated nutrients always to the lowest recommend dosage (1ml-4ml = 1ml)
So yesterday morning spotted some leaves with black spots and starting to loose color altogether.
So i posted some pictures and i was told it was probably a Cal Mag def. since i never added any.
I used 3ml of Cal-Mag by Advanced Nutrients 4-0-0 in 1L of water and i shared around the 4. plants.
This morning the leaves look worse and it seems to be moving up the leaf discolouration, that leads me to think N-P-K.
Any advice is welcome, i really want them to be full strength for the flower push.

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To me, it looks like eithet calmag deficiency, or maybe she needs more food than she's getting.

@Itisi @Vlad The Inhaler @XxxAuto @Bailey @Wile e Peyote @sanguine

Help! [emoji121] [emoji2]

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[woody]

I can see calcium def for sure with the brown spots and some mag def on the uppers.
What are you ph'ing the feed to?
Do you know the soil ph? If its off the plant will strugle to uptake the feed you just gave them- and it will take a couple days for the feed to have any effect.

 

[duartemartorell]

I can see calcium def for sure with the brown spots and some mag def on the uppers.
What are you ph'ing the feed to?
Do you know the soil ph? If its off the plant will strugle to uptake the feed you just gave them- and it will take a couple days for the feed to have any effect.

I always ph the water to 6/6.5.



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[iampepe]

The cal mag won't fix it over night and won't repair any damaged leaves. I'd keep feeding the cal/mag, it definitely won't hurt, I use a lot of it under cob lights, 10-15ml per gal. You can foliar spray to speed up the plant getting the cal/mag. Those girls could use some nitrogen too, if they were mine they'd have some burnt leaf tip pushing them to the max.

 

[Bailey]

Calmag deficiency is very similar to the pics but since ure using hps and nutes you specified I'm leaning towards bug damage as it's at the veins of the leafs where the damage is and that's were those pesky bugs like to feed.
I'm going to tag someone who has slot more experience than me to help @Waira
Best of luck

 

[Waira]

hey guys!

Duart'-- that spotting and yellowing along the veins is indeed Ca defc. starting, but there are other symptoms I see,... the overall yellowing on lowers could be some N getting tapped out from them, maybe Mg, as both are mobile within the plant... multi-defc. symptoms can get pretty muddy for diagnosis! I don't like the looks of those tops either, can you get me a close up of them? That smacks of an immobile nute element defc.,.. In any case, get me the Atami NPK #'s, and your dosage/frequency as well please,... And lastly, but most important, you need to get an in-soil pH taken, as off-pH is usually the cause for such multi-symptom defc.'s,... Are you pH'ing your feeds as well, and doing it after all nutes are in, including the Ca-Mg? Mind that 4-0-0 too, that's a lot of N coming in from a supplement,...

 

[duartemartorell]

I have a high fever as soon as I can get out of bed I'll check all the info you asked.
I have a pH soil reader and last read was 6.5
And yes I always keep the pH of feed and water at 6,5 oscillating by 0,3.
Thanks again for all the help


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[duartemartorell]

hey guys!

Duart'-- that spotting and yellowing along the veins is indeed Ca defc. starting, but there are other symptoms I see,... the overall yellowing on lowers could be some N getting tapped out from them, maybe Mg, as both are mobile within the plant... multi-defc. symptoms can get pretty muddy for diagnosis! I don't like the looks of those tops either, can you get me a close up of them? That smacks of an immobile nute element defc.,.. In any case, get me the Atami NPK #'s, and your dosage/frequency as well please,... And lastly, but most important, you need to get an in-soil pH taken, as off-pH is usually the cause for such multi-symptom defc.'s,... Are you pH'ing your feeds as well, and doing it after all nutes are in, including the Ca-Mg? Mind that 4-0-0 too, that's a lot of N coming in from a supplement,...

Ok so I'm feeling a bit better to get out of bed and check on the Nutes.

So these are the nutes I have and I used the bloom only after preflowers and once, as the next day they were showing nutes burn so I flushed them. After the flush I used again the minimum recommended dosage around 2ml of each (give or take) Grow C, Alga C , Root-C
Today it seems they are looking a bit better, I have been spraying the Cal/Mag and I have also fed them 2ml/l to all 4
Thanks again for all the help


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[duartemartorell]

Here is a little update on the plants,they seem to have recovered well from the Cal-mag def. now I just add to the feed every week 2ml of cal mag.

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