Magnesium Deficiency? Brown spots Interveinal chlorosis.

[Mac]

Couple of small brown splotches and some interveinal chlorosis on the top of the plant.

I believe I have a Magnesium issue here, looking for a confirmation/2nd opinion before I treat her please and thank you for your time



Soil or hydro or coco: Coco

Strain: Mephisto Genetics 4 Assed Monkey

Photo or Auto: Auto

plant age: 50 days from seed

pot size: 5 gallon hempy

has it been repotted? and when?: nope

soil type: N/A

nutes or additives used and how often for soil: N/A

Air temps (max min):32/28

Res temps (max min): N/A

humidity: 45%

lighting type and wattage (hps, led, cfl): 2 x LED HLG QB 260w dimmed @ 200w each

Light schedule: 24/0

ph level: 5.9

EC (hydro and coco only) 1.3 (600ppm)

Background EC. 0.4

feed schedule and nutes (for hydro and coco) Greenleaf Nutrients Megacrop 3 grams per gallon daily to run off (20-30%)

Any thing else: diary is in my sig for a full plant history if required

[Jingo]

That's what I'd say, very early mag def nice catch. I was thinking about trying that megacrop but it's a least $125 for 20 lb over here.



J

My 2020 outdoor grow autos and photos in pots

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[Mac]

That's what I'd say, very early mag def nice catch. I was thinking about trying that megacrop but it's a least $125 for 20 lb over here.



J

My 2020 outdoor grow autos and photos in pots

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Cheers Jingo, had some advice from Gardro in the diary about it being too high a Daily Light Integral being one of the root causes leading to the mag lockout.

So going to back my lights off from 24/0 to 20/4 and dose up with calmag in the morning. I was planning to give em a dose when they finished stretching but didn't... typical


Out of stock at the minute but they do 1kg bags at 75% off to try, theres a discount code on the product page. I guess its the taxes and shipping that push that cost up for you?

[Jingo]

It's interesting how many odd deficiencies you can get from LEDs, gardro really knows his stuff.

Yeah I guess all prices here are always quoted with shipping and pretty expensive stuff.



J

My 2020 outdoor grow autos and photos in pots

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[Herbitual]

It's interesting how many odd deficiencies you can get from LEDs, gardro really knows his stuff.

Yeah I guess all prices here are always quoted with shipping and pretty expensive stuff.



J

My 2020 outdoor grow autos and photos in pots

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Truth.

Tackling the cause is Gardro’s game and is therefore always worth listening to.


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[Mac]

Gave them a 4 hour lights off period last night, and a dose of calmag with their feed today, 1.5ml/L.

They don't look to be any worse today, despite some 35 degree temps yesterday So will continue to monitor and keep you updated

[SBTUK]

Hi I wouldn't rule out nitrogen toxicity , leaves look a bit on the dark side this would also cause lock out as your experiencing at the mo, I've just had one of my plants with similar symptoms I flushed thoroughly (4 weeks into flower 'photo')then fed a nitrogen free diluted bloom feed , can't say this will sort your problem out but a week later my plant has recovered & is back on track