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[Bluey]

Mag deficiency.
Likely low pH at the roots.
Dolomite lime to bring up pH. Bit of epsom salts for some extra mag.

[Smallgrow]

Hi all
can I get some suggestions/confirmation on peoples thoughts on my problem here with the one biggest plant . I have mine ,I’ll share after so as to not bias your input.

thx in advance , GWE community rocks!

These are outdoor , been a bit wet if anything, but good access to sun , generally healthy, about 5 weeks old, in “Kis” mix Black Swallow brand organic living soil. 15g fabric pots
temps have been in a good range 15 to 30 C
There appear to be no bug problems

[WeedingOptions]

Yeah that makes sense, the other cycles was pretty stable so I assumed it wasn't the issue but this last one the drop was significant so will definitely keep an eye on that

[Bluey]

Given its a hydro setup and pumped around check the pH daily and adjust to keep it 6 to 6.2. If it's dropping as it appears to be bring it up a tad further, say 6.3 and monitor it to make sure it does drop. Varying the pH in this range is more beneficial than not varying it.

[WeedingOptions]

Double checked the PH and it was low this time around 5.30 so you all might be right. Also the nutrient absorption by PH chart shows some nutrients are better absorbed above 6 and I was keeping it pretty tight there. Adjusted to 6.20 to watch for a few days.

[WeedingOptions]

Looks like a PH issue from here, Leaf Septoria spots are round often with a pimple and a dark spot in the center (that would be the spore). So what PH are you running? Are those rocks coco? IF so were they treated/prepped before the grow?

clay pebbles, they are not in contact with the water and were washed before use. PH = 6

[WeedingOptions]

2 stones, I was having the issue since last water cycle, so it seems it is still here. Tested PH before and during the last cycle pretty stable around 6.

[Bluey]

Any problem that caused the rust/brown spots may be gone.

Are you running an air stone in your hydro tank?

Check the pH between top ups and completely empty your tank often rather than topping.

The only hydro I've done is in coco so I can't offer much.

[Rwise]

Looks like a PH issue from here, Leaf Septoria spots are round often with a pimple and a dark spot in the center (that would be the spore). So what PH are you running? Are those rocks coco? IF so were they treated/prepped before the grow?

[WeedingOptions]

It's hydro. I suspected of calcium deficiency before and was already using calimagic which I upped a bit last time, this is my last refill breakdown (PH 6.00):

Veg	7.58	L		Start	6/26/2023
				Days	27
				Target	80
				ETT	53
Micro	4.93	ml
Gro	4.93	ml
Bloom	4.93	ml
Cali	9.86	ml
Sweet	5.33	ml
Guard	4.00	ml
Silica	5.69	ml

For me it looks more like Leaf Septoria https://www.growweedeasy.com/cannabi...-leaf-septoria trying to confirm

Thanks for the LST advice

[Bluey]

I think you do have a nutrient problem that is likely because of low pH and may be made worse by your environment and watering schedule. Whatever is going on is showing as a calcium deficiency in the leaf and I suspect may have been around for a while.

Additionally you need to be disciplined for torturing your plants like that. When you LST don't wrap it around the leaves like that, just the stem. You're creating hot spots for disease and pests doing that.

I assume you are growing in coco. Is it recycled?

If so give them a good flush with nutes in your water with a pH of 6.2. You can add a suppliment like calimagic.

Raise RH to about 60 if you can. Temps are pretty good

[WeedingOptions]

Hi all, my second time growing this auto strain - Magnum. Didn't face many issues during the first one bit the current grow is presenting these spots which are kinda weird as it doesn't seem to be a nutrient issue, following Nebula's schedule. The plant still looks overall pretty healthy and the spots are starting from the bottom leaves. I'm growing indoor hydro, temps running from 76-81, humidity 43-48% at 27 days. Topped and LST.

Any ideas?

[Rwise]

Learn how to use the info here, it can save you time and money.

https://www.growweedeasy.com/led-grow-lights

https://www.growweedeasy.com/basics

[Rwise]

One needs to go by the watts pulled from the wall not the spoof watts.

[Rwise]

Yep only 90 watts!