Well folks, whaddaya think it is?

I'm essentially new to the whole gig so let's hear your thoughts.

It's happened VERY rapidly. I didn't notice it AT ALL lastnight, and tonight boom there it is.
So in a way wouldn't that suggest it isn't LSF? That's a fast spread!

It really affected my weakest plant the most. A few large fan leaves on the healthier looking plants are affected aswell.
Seems to be targeting the lower leaves mostly..
Also the stems of SOME of the affected leaves are purple.

I guess it could be MG def due to my sucky water? Whatever it is, it's no good.
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Under a 270 watt in a drobe
Good ventilation (inline)
Temps stay around 80-85
there's a small fan blowing right over the top of them aswell.
Humidity @ 30-40%

The only thing that was different over the past 24 hours was the addition of a 4litre plastic-thingie w/ water
could it have been offgassing somehow? ssems doubtful

the pic shows how they were setup lastnight
Down below the pc-case and on the right side is where the little tupperware thingie was sitting. I doubt it's related, but it's the only change i've made to the environment.
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I noticed it when I repotted them tonight. Overall the plants look good, just a number of leaves are getting yuk

So Randalizer brought it to my attn that it could be due to em bein rootbound.

take a look @ the diary if you'd fancy http://www.uk420.com/boards/index.php?showtopic=195215

Seems like a sensible conclusion.


Thanks for readin this folks. Take care!

Have you been spraying them ?

It's difficult to tell in those photos, but some of it looks like water damage.

Are you feeding them at all ?

Yeah I know the pic quality is hurtin. I threw away twice what I posted here in TERRIBLE pics.
Stupid coolpix is all auto, can't seem to find the manual settings else I'd prolly beable to get it.
It gets the zoom right but shutterspeed is off so it motion blurs from my holding.
Else it does the opposite.

Pain in the arse.



No spraying whatsoever. I learned that early on in this grow hehe

No I haven't fed them a thing since I learned that one early in the grow too

Maybe a month ago they were fed, but that's it. Otherwise it's just the straight foxfarm ocean forest soil that they're in.

I think it could be from them getting bound. They were rather dry, and may have been all day. I'm not certain that's the culprit though...guess I'll have to kick back and wait for some good responses from either you folks or the plants.


Thanks for taking the time to attempt to diagnose my problem compostverte.
Very very much appreciated


Cheers mate

Looks unlikely to me that they'd be rootbound mate. Those pots look big enough for the size of the plants....


What do you mean by this exactly? Is it uncovered? If you have standing water in that little area, it's bound to encourage mould

What kind of extraction do you have in there?

Looks very similar to something I had which Knacked my plants. I thought it could have been LSF too but I had been careful keeping my environment clean and also treated young plants with dithane and the likes.

There was no conclusive diagnosis, some said overfeeding, some said underfeeding, some said lockout, others said off-gassing from the tent.

In the end I followed most of the advice:

-Improved airflow, luckily I was able to turn my fan up to compensate

-Removed the weird reflective polystyrene underlay (the type under laminate floor) from under the plants in case it was poisoning them

-Got my thermostatic heaters in there to keep the temperature and humidity range correct

-Potted up (mine did need it, not sure that yours do, but would have to see the rootzone to be sure)

-After potting up and settling in i gave them a good feed as I'm only in lightmix and mine hadn't been fed since planted.

-Got the plantmagic essence starter kit, some bio-wetter and bio-silicon

5 Days later my plants were green and happy. To be honest I put it down to the plantmagic products more than anything else. The combination I used should have (and has) treated any active LSF, then acted as a preventative due to essence; improved nutrient uptake and general plant health due to silicon; improved soil structure and water uptake due to the wetter.

Hope thats of some use Jasper and hope you get it sorted

Yea it was uncovered. I've since removed it. It was only in there for 24 hrs...as for mould the humidity sits around 30-40%, so I doubt mould will be an issue (for now)


Extraction is an Eco 4" inline fan.
Temp range is solid, and there's plenny of extraction/intake for em to breathe n erything.

Those are teh roots as of lastnight prior to potting em up.


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Thanks a bunch for stoppin by to help out

Howdy Mr. Sparkle

It seems to me that your experiences along w/ mine may point to needing a potting up and whatnot.

I think the environment (temp, humid, airflow etc) on my setup is pretty solid.

There's no poly in my drobe, although I imagine the cheap wood it's made of COULD potentially offgas. Just have to wait and see if that ends up truly happening.

If they don't show signs of slowing this junk down I'll prolly feed em, although they should beable to grab some new nutes from their new resting place.

If all else fails essence it is

I greatly appreciate you stoppin by to add your .02, thank you thank you thank you!

Happy growing, hopefully yours are doing well

I dunno man, it sounds to me like that water caused the problem and it's mould, but it's hard to say for sure. It could certainly come on quite fast, but that seems incredibly so...

It doesn't look like Mg def, as the veins haven't become relatively darker.

I would keep an eye out for it spreading and if it does, remove the affected leaves and treat it for fungus...

Good luck sorting it out dude!

It's still continuing on.

I guess it could be mg deff... The upper side of the stems on basically EVERY affected leaf are a purplish.
The affected leaves also go darker before they start to dry out, at which point the weird spots come out.

The leaves of the ones in the picture are very dry. They start out with sort of an "off" texture...then it progresses to them getting darker and darker green at which point they start developing the weird color spots and necro patches.

I'ma pick up some epsoms tomorrow and feed em a dose of that, who knows maybe that's the problem?

Here's some fresh picks.

Also it doesn't seem to be localized or anything...it's basically random distribution amongst the plants and the leaves.
I don't really think it's a fungal infection anymore.. just doesn't "feel" like it.

Also a number of the affected leaves started curling up aswell. Mainly @ the tips.Click to view attachment
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It happens astonishingly fast too..and much to my disappointment I removed a fair number of leaves today

The new growth is just fine..looks rather peachy really

I just have absolutely no idea what the problem is.
This sucks.

I intend to get some epsoms and some sort of a foliar spray for fungi-type things....those are my two plans of attack right now.

I've also upped my exhaust speed..even though it's pulling a good deal of air through.

This is horrible!!


PS thanks for stoppin by ERI... much appreciated

I've also added a layer of perilite to the very top of the soil to try and keep it from drying out so damn fast.
In some ways I think it COULD be linked to em getting somewhat dry...not sure tho.

So I'll throw lots of diff things @ the problem, and in the end it'll prolly get better.

Actually this morning (lights on 9pm-3pm) the spread seems very minimal. No real nasty looking leaves, and one of the ones that showed signs of heading that way hasn't progressed any..

I don't think it's Mg man, in my experience Mg def shows throughout the leaf as highly visible veins way before it gets to that kind of destruction and yours doesn't look as apparent. I could be wrong, but i've had Mg and mould problems before and Mg just doesn't go from one stage to the next that fast.


Your exhaust should have been on full the whole time, 24/7. Where are you extracting to?

Yea, I'll skip the epsoms then.

Exhausting to the open air of my bedroom. It's only a 12x12 area maybe...it's really the only option. I leave the window open as best I can when I'm not here.

I'd think that my respiration would be enough to offset the CO2 intake of the plants though...

Think they're suffocating?!

Temps are good though, so I'd tend to think that the temps would get pretty high if it weren't pullin plenny o' air...

I don't think they're suffocating, but the fact you exhaust into the same area you are taking are from means that if it is mould, the spores in there are just circulating... so once a few spores get in, they're much more likely to end up causing mould.

Also they will definitely breathe easier with proper air exchange.

Is it impossible to find a way to extract to outside the room? A chimmney, air vent, hole in the ceiling... something like that?

Yeah unfortunately it is near impossible...I could prolly rig something up in the window, but it'd be sketchy. Not to mention wintertime is here or near..

My setup is less than ideal, as I have 4 housemates...

Could it really be mold tho w/ humidity never above 40% and temps where they are?

Plus typically one can smell mold no? There is no off scent to the plants nor the soil.

Would mold target the upperside of the leaves like this does? I'd tend to think that it'd target shadier area's first?


I REALLY appreciate you helping me to troubleshoot this.

Another thing to be noted:

It seems to only affect the really big fan leaves. All the smaller ones are just fine.

i had a similar looking problem earlier in my grow (photos should be in my grow diary) and it turned out my wet/dry cycle was off and i was letting them get too dry between waterings. it may be of some help..............

heres a link, post 55 onwards........

http://www.uk420.com/boards/index.php?show...90603&st=45

Yeah, I've had it with perfect temps + humidity levels. It all depends on the type of mould... it certainly prefers high humidity, but keeping it low doesn't seem to prevent or stop it


Nope, can't smell it... it's not like getting mouldy clothes


Yep, always seems to. I think it's because the spores land on the tops, rather than the bottoms

Do your housemates know you are growing?

People seem to report positive things about Essence for treatment, if it is mould that might be your best bet. Personally I use Citrofresh, but it doesn't work on all the strains out there.

I think you'll find that without extracting to outside your grow area you'll always be susceptible to it though. If you have a fan + extract outside, it keeps the spores from settling and then sucks them out

Interesting, I would've never thought that a mold strain would get such a foothold in this type of environment. I learned something today!

My housemates don't know I'm growing, although they wouldn't care if they did I feel it's best that they don't know.
My setup is somewhat similar to a hostel in that we're all randoms and didn't know eachother in the beginning.

Nobody comes in my room or anything, aside from my one room-mate who I've chuffed w/ a few times (he offered)

He never took a second look @ the ol drobe, so I think I'll be in good shape.

It wouldn't be the end of the world if they found out, just better for all parties involved if they dont know.


Yeah this environment is less than optimal for growing, and I'll be relocating at the beginning of next summer (possibly earlier, depending on a buddy that may want to get a place)

Should that be the case I'll have a far more optimal grow situation.

The whole move was very last minute, I moved in the day that school started..
tis ok tho!

So I no longer can avoid it, it's not underwatering. This is still happening, even though I've been right ontop of the watering schedule. One plant has been SEVERELY trimmed back due to a fair portion of the leaves being bad.
2 are virtually unaffected, and the other is so-so.

Purplish uppersides of leafstems ALWAYS preceeds the rotting thing.

I'm starting to think that it's some sort of lockout do to PH problems w/ my water or something. Tomorrow I'll hopefully go buy a ph pen and some citrofresh or essence.

This is fuct, it's actually really sad tearing off so many leaves of the plants.

Thoroughly bummed.

hi mate, sorry to hear about yoyr issues, im going throuhg somthing very similar at the moment, id defonatly recoment treating them with essence as soon as possible, to me it seems the purple stems are a give away its somthing ive noticed on my badly affected plant. Even if its not lsf the essence will only do them good anyway! I hate having to trim big leafs of my plants, its as painful as chopping of limbs from my bobdy! good look bro.
p.s, have you noticed any rusty spots on the leafs?

Yeah, lotsa rusty death.

Looks fungal to me. I would remove affected leaves and spray with trichoderma sp that is assuming you can't get essence or similar product in your neck of the woods.

Yeah I've been removing em.

Bought some neem oil, but apparently that's not really a fungicide. I gave it an application though, because I've been told that it CAN have fungicidal properties?

Yeah, no essence here

I'll prolly have to go get some other fungicide product. I didn't realize neem wasn't until I got home ><