OG KUSH overwatering combined w/ nut def ??? need 2nd opinions

[fader1]

So my bloom started out for the most part super healthy. day 1 thru 6 were great new growth dayly.

Days 7 thru 11 things start yellowing with some new growth leaf twist which I thought was ph. ocurring on 2 out of 5 plants So I payed close attn to keep ph at 6.0.

Days 12 thru 15 things have continued to go down hill, over these days the affected plants leaves have started drooping and continued to look worse and worse. So what used to be my healthiest plants are looking like my worse I think now after a little reasearch I think it might be over watering and some sort of nuit deficancy due to a lock out


og kush plant day 15 ( was very strong now not so much)









this one is another og kush where you can see another one looking weird
also can see the twisty leaf thing on surrounding plants



details on my grow are as follows

4 - 1000 watt hps
sealed room with co2 tank system set to 1500 ppm
24000 btu A/C
top feed drip
6" rockwool cubes
advanced nutrients 2part A&B 2+ program 1400 ppm 5.8-6.1 ph I try to keep it at 6.0 mix was taken off their nutrient calculator on a 8 week cycle
70 gal resi using RO water
I use circculating pumps, areate the water & keep water temp between 68-70 degrees

irrigation schedule is 2-3 minutes every 3.5-4 hours while the lights are on.


I have done a clearex rinse til the ppms stopped going up and cut the nuitrents down to 1200 ppm I am not sure what else I can do and wanted to get some second opinions on what can be done

 

[Guest]

do they look to be even a little bit more perky in the morning (lights on) and end up saggy like that by the end of the day?

that almost looks like underwatering because of the way they are drooping so hard... you don't water at all during lights off? that could be it (then again i could be wrong)

under and overwatering almost look the same except underwatering has a more hardcore droop... probably not that though (if you were vegging the same way)

if i was you i'd cut those PPMs by 50% at first and see if they perk up after a few days

1400 ppm seems a bit high but then again i have no experience with og kush, but if you're just starting to bloom it may be too much... i found to never follow the dosing suggestions on the bottles of ferts... they're way too high

good luck man!

 

[dre86]

I see an underwatered plant..WATER ASAP!!!111

 

[JDOG6000]

I see a rootbound plant.
Put that RW ontop of a slab.

 

[sproutco]

Did you change the nutrients to a flower formula? You mentioned twisting leaves...are they going round and round or just twisted 90 degrees toward the ends?

 

[JDOG6000]

I'm telling you guys.
That is a rootbound plant.
I'd put money on it.

 

[m.steelers]

i would say it could be rootbound and mainly underwatered in that pic. rootbound makes everything else that more sensitive. Can you keep a rootbound plant happy? Yes. But it is very difficult. I cant see that other pic too well... but the first is dying for water. overwatered droop (more like pucker) more in a curled fashion where underwatered just hang down limp exactly like that. if you arent watering when the lights are off it could explain why they perk up when the lights come back on.... they are getting a drink.

 

[JDOG6000]

I've seen rootbound plants.
And that is one.
It may be over watered or underwatered.
But if you don't put a big slab of RW under it.
Kiss it good bye.
It could totally die at any minute.
If you fix this.
It will heal.

 

[m.steelers]

looking at the pic again and the size of the plant i would say you are right dogg. i didnt notice it was just a cube sitting on a tray. that plant is way too big for that size cube

 

[JDOG6000]

Ya, thats what I noticed that tipped me off.
A huge OG Kush plant in a tiny cube.
And on top of that.
OG Kush has huge roots compared to other strains.
Plus rootbound causes hermies with OG.

 

[fader1]

Did you change the nutrients to a flower formula? You mentioned twisting leaves...are they going round and round or just twisted 90 degrees toward the ends?[/QUOTE

it has been changed a flower formula and is just twisting 90 degrees toward the ends

Ya, thats what I noticed that tipped me off.
A huge OG Kush plant in a tiny cube.
And on top of that.
OG Kush has huge roots compared to other strains.
Plus rootbound causes hermies with OG.

the plant isn't that bigis it its only like 3 feet
I have been using 6" cubes for a while now(6 years) with way larger plants and never had a problem before.Also there are larger plants in the room that aren't exibiting the same problems. When I look under the cube there are roots hanging out but not so many to be root bound although they have a color that does'nt look healthy like a light brown would chemical burned roots cause similar effects

J what would be somethingI could see that could prove root bound

agian this was one of my best plants healthy white fuzzy root hairs then over like a week.......... done

also it dosen't really perk up when the lights come on

I have always been told that watering at night is of no use because plants don't need it and it can also cause mold, plus the cubes never get super dry I water when the lights come on and then every 3.5-4 hours for 2-3 minutes ph 6.0

 

[sproutco]

Phosphorus toxicity can bring on zinc deficiency. That might be the 90 degree twist in the leaves. Could be more deficiencys than 1. You should be measuring your ferts in ppms of each element like 100 ppm nitrogen. Your aiming for:
100 n
50 p some folks use 100 p but its really not needed
200 k
100 ca
50 mg

You see the ratio of 4:2:1 of potassium to calcium to magnesium

Use the calculator in my signature below to figure your ppms.
Here is an example without net weights or total ml entered but instead left at 1. You would find those on your bottles to make it more accurate. Click on this to enlarge. Once larger, put your cursor in the bottom right corner of the picture to make it even larger and clearer.

 

[JDOG6000]

Like I said.
Kush roots are about double the size of other strains.
Especially OG Kush.
I'm fairly positive that the problem.

 

[JDOG6000]

Cover those cubes too.
You got some monster mildew growing on them.

The last pic looks way under fed too.

 

[Legit_User]

Looks to me like you fried some roots.
Did it get hot in your room?
I call that the death wilt.
Has happened to me a couple time in my aero system when the roots got too heated.
I would put it back in veg.
Stay peacefull

 

[inflorescence]

It's definately a root problem. If the roots get too dry then too wet you'll essentaily rot your roots. Then it doesn't matter how much water is in the cube because the roots won't be able to absorb the available water because they are damaged, so even if the cube is wet, you'll get a dry plant.
Hygrozyme it and see if the damaged roots will be dissolved, but I don't know if that will work fast enough. It's also gonna shock the roots even more initially and this may be too much for a plant under that much stress already.
You need to act fast because this problem will not correct itself.

 

[fader1]

so I am pretty sure what happened after some one said rot rot I remembered reading about Pythium and how it causes root rot below is the definition:

An often-occuring mould affecting cannabis is pythium. This mould causes root-rot, and rot in the lowest part of the stem. It appears most in young plants, and in cuttings. Larger, healthy plants are less sensitive to pythium. Plants get 'falling-over disease' with a serious pythium attack. We don't have to explain what that means Pythium is recognizable by the bark at the base of the stem turning brown. In the beginning, the 'brown attack' is easily removable. Later, the rotting process eats deeper into the base of the plant. Pythium is a fungus which flourishes best in wet and humid environments. Pythium spores spread only through water. Two kinds of spores are formed; Swarming ones and stable ones. The swarming spores germinate best at a temperature of approximately 15 degrees Celsius, while the stable spores germinate if it's relatively warm; around 28 degrees C. To prevent a pythium attack, a constant temperature of the soil or rockwool is needed. Large fluctuations in temperature should be avoided. Pythium can only be fought in a limited manner with chemicals. A proper relative humidity must also be maintained (not too high).


it explains alot about how some of my plants looksome had denser growth
which didn't alow as much evaporation in the cube so it gave the pythium
an optimum environment to flurish moist and not in direct light

so I have done the following and the rest look like they have been able to
show improvment

1. cut down feeding time to 1.5 minutes every 4.5 hours
2. also cut down on resi ppms from 1400-1500 to 1100-1200 maintain ph of 5.9
3. sprayed the bases with a organic fungicide
4. brought water temp down to 65 degrees
5. placed coco mat covers over the tops of the cubes they let water through but not light so alge and mould can't grow as easily



here are the ones that lived

 

[inflorescence]

The more I think about it the more I think it's pythium, or maybe fusarium.
The algae on the cubes cuts down the DO and that would shows signs of overwater but also allow the pyth to grow. The pyth chokes off the intake of water so you then get that dry look. pyth is systemic and can move up the plant and in the case of fusarium will literally clog the plants xylem, or is it pholem? with their mycellium and this will prevent water transport even if the medium is saturated.
H202 flush certainly wouldn't hurt.
Your first tip off that this was occuring should have been recognizing that you kept watering the cube yet it didn't seem to dry down as much as usual.

 

[Guest]

Get some Mycostop and Hydroguard. Use it always from the start. More rootmass room is needed on those plants..

If you already have "root rot".....it may be too late.
The black stuff IS fusarium- watch for stem rot.. sorry.

I'd watch the stalks carefully for signs of weakness and rot at the base where it enters the cube. I'd apply
the organic fungicide to the 3 inch area of each stem where it comes out of the cube.

PS Jdog is right, you wil have better yeild and less problems with more media volume.

Good Luck

 

[Legit_User]

6" cubes are not your problem. I have seen mamma plants in Hugo blocks for 16 months....
No need to change what has been working for you for 5 years.
If your air temps never got high enough to cook the roots then I agree that it is a rot problem.
You need to take your system apart and flush it all out with 1/2 cup bleach per 5 gallon water-- Or 1 tsp gallon 35% H2o2.
Good luck