Is this early signs of an issue?

[lunarman]

Problem: yellow blotching on newer leaves at top of canopy only. lower leaves show nothing like this.

Medium/grow method:
coco with lots of perlite, 10% biochar, EWC. DE and crushed dunks in coco for bugs.

Feed: and supplements used:
AN Perfect PH Tangs easy schedule
Days 10-20
Sensi Bloom A&B at 1ml per 1L (of both A&B) - Might need some grow nutes????????????????
Days 20-30
Sensi Bloom A&B at 1.5ml per L
Full optic foliar products mix sprayed every other day
Light calmag at this point

water source:
50% tap water at 7.2 PH and 190 ppm and 50% bottled RO.
autopot automated watering
sprouted Thursday, January 25, 2018
Transplanted Friday, February 02, 2018 8
Autopots on Thursday, February 15, 2018 21

Strain/age:
DP Think Different
Day 28

light used:
1 bigsm0 autocob and part of a 600 watt HPS. both 30 inches above canopy.

Climate:
Maintaining 55% RH and 23C/73F

Additional info: I have see this before in the last few plants in my tent. I had fungus gnats last run by very confident they are gone, full disclosure and all.

The plant is looking excellent. No issues before this.

I am using the Bloom and not Grow so maybe this is a bit of N deficiency? If it is, what is a good product to add that boosts N that I can add to my autopots reservoir? I was thinking maybe House and Garden Nitrogen Boost.

 

[namvet25]

Problem: yellow blotching on newer leaves at top of canopy only. lower leaves show nothing like this.

Medium/grow method:
coco with lots of perlite, 10% biochar, EWC. DE and crushed dunks in coco for bugs.

Feed: and supplements used:
AN Perfect PH Tangs easy schedule
Days 10-20
Sensi Bloom A&B at 1ml per 1L (of both A&B) - Might need some grow nutes????????????????
Days 20-30
Sensi Bloom A&B at 1.5ml per L
Full optic foliar products mix sprayed every other day
Light calmag at this point

water source:
50% tap water at 7.2 PH and 190 ppm and 50% bottled RO.
autopot automated watering
sprouted Thursday, January 25, 2018
Transplanted Friday, February 02, 2018 8
Autopots on Thursday, February 15, 2018 21

Strain/age:
DP Think Different
Day 28

light used:
1 bigsm0 autocob and part of a 600 watt HPS. both 30 inches above canopy.

Climate:
Maintaining 55% RH and 23C/73F

Additional info: I have see this before in the last few plants in my tent. I had fungus gnats last run by very confident they are gone, full disclosure and all.

The plant is looking excellent. No issues before this.

I am using the Bloom and not Grow so maybe this is a bit of N deficiency? If it is, what is a good product to add that boosts N that I can add to my autopots reservoir? I was thinking maybe House and Garden Nitrogen Boost.
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If your using Tangs feeding advice I would pm him and see what he thinks.The only thing I see is your using light cal/mag but you should be using higher dosage once she starts flower mode and that's ware she is now.

 

[lunarman]

If your using Tangs feeding advice I would pm him and see what he thinks.The only thing I see is your using light cal/mag but you should be using higher dosage once she starts flower mode and that's ware she is now.

I zoomed in closer and the brown spots might be mag deficiency. I created a new feed batch with 2mL/L calmag and reloaded the res. Will see if that fixes it.

 

[Troy01]

Looks like a Magnesium deficiency to me. Would up the Cal-Mag or put a little Epson salt in you solution.

 

[BigD1128]

@lunarman looks like I am having the same issue. I can’t tell if it is a mag, ph or light intensity issue. Hope we both get this worked out!

 

[lunarman]

@lunarman looks like I am having the same issue. I can’t tell if it is a mag, ph or light intensity issue. Hope we both get this worked out!

What type of pot are you using and medium?

 

[BigD1128]

I have a post on the Infirmary main page. Titled CalMag or PH. I go into great detail there

 

[lunarman]

I have a post on the Infirmary main page. Titled CalMag or PH. I go into great detail there

I'm going to also do what Waira suggested. Just rounding up some epsom salts and a wetting agent and will be spraying today. Will be interested to see if it works and addresses my issue.

 

[BigD1128]

I will be doing the same. Good luck!

 

[Waira]

:smoking: Lunar, what's up?

...so, this is on the upper leaves, you say,... that hints at an early immobile nute defc. starting most likely,.. hard to say just yet which one, it's not definitive enough in symptoms.... You're using OverGrow too I assume,... it has some micronutes, but not the full spectrum from what I read, so I'm thinking something more 'exotic" like Mn, B, Mo,..forget if Zn is in OG or not,..? On occasion, Ca defc, can start up higher too, it's poorly mobile, and under LED's, issue can be more pronounced,... But with the OG foliar, it's hard to believe ca defc. is hitting,.. I do see some fine spotting typical of it though,... .........Mg defc. will hit lowers first and worst, pretty consistent with that,.. it's very mobile within the plant, readily translocated,... No N issues here at all!
... are you doing the 15-20% run-off each time with the coco? Checking the EC/ppm of run-off? You're familiar with the do's and don't's of coco, I forget,... if not, a salt build-up problem could be the cause, an/or off pH,.. nevermind what AN says about self-buffering, that's in low ppm water (which you have) and while in solution only,.. once in the pot, all bets are off, too many other influencing factors in play! Either way, an in-pot pH check would be wise,... point here is to see if you have a lockout/uptake blocking issue, or a simple lack-of defc.,....