Insane yellowing overnight.

[midwestganja]

Ok im not sure what the hell happened, I have been feeding them regularly, everything has been pretty smooth, then I fed them last night, up'd the bloom just slightly, and today I wake up to this.



Then this 2nd girl has it even worse, and almost looks nute burnt like I said..


NEED to figure this out I dont know what the hell they looked great I mean perfect almost up until yesterday when they got fed. It almost seems like nute burn thats the only thing I can think of. Pls help!!!


SOIL:

How long has this problem been going on? Just today!
What STRAIN are you growing? Master Low
What was the establishing technique? (seed or clone?) Seed
What is the age of your plants? 44 days from seed
How long have they been in the soil mixture they are in now? since day 1
How Tall are the plants? 17"
What PHASE (seedling, vegetative or flower) are the plants in? flower
What Technique are you using? (SOG, SCROG etc) n/a
What size pots are you using? (Include how many subjects to pot) 3 gallon
What substrate/medium are you using? What brand of soil mixture are you using?(percentage of perlite, vermiculite...etc?) 3 part pro-mix hp, 1 part perlite, 1 part ewc
What Nutrient's are you using? Earth Juice Grow/Bloom/Catalyst
How much of each nutrient are you using with how much water? *Knowing the brand is very helpful* 1.5TBSP Bloom + 1 TSP Catalyst per gal
How often are you feeding? Approx every 5 days
If flowering, when did you switch over to using Bloom nutrients? approx 2.5-3 weeks ago.
What order are you mixing your nutrients? (example: veg nutes 1st, bloom 2nd ect) bloom, then catalyst
What is the TDS/EC/PPM of your nutrients used? n/a
What is the pH of the "RUN-OFF"? 6.5
What method of pH test was administered? Using Strips? pH pen? pen
How often are you watering? approx every 5 days
When was your last feeding and how often are you feeding? Yesterday(they looked fine!!!!!!!!)
What size bulb are you using? 168W of CFL, 2700K
What is the distance to the canopy? 2"
What is your RH Factor? (Relative Humidity) 35%
What is the canopy temperature? 77F
What is the Day/Night Temp? (Include fluctuation range) 71F
What is the current Air Flow? (cfm etc.) 80CFM
Tell us about your ventilation, intake exhaust and when its running and not running ? running 24/7
Is the fan blowing directly at plants? nope
Is the grow substrate constantly wet or moist? nope
Is your water HARD or SOFT? hard
What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water? 50/50 RO and Tap water mixed
Are you using water from a water softener? no
Has plant been recently pruned, cloned or pinched? no
Have any pest chemicals been used? If so what and when? no
Are plant's infected with pest's? no

 

[razz]

they are supposed to yellow up some toward the end of flowering, about two weeks before but as long as the buds are not affected, i would just monitor these. it's not that unusual, unless you nitrogen the shit out of them like they do in amsterdam!

 

[GHETTO_grower]

I dunno, the necrosis is a little funky there , I'm thinking the up in the bloom dosage....
perhaps try flushing them for a night then when they need watering again give them the regular dosages again, Also I think it may be nute related due to the fact you said all this happened overnight and they were perfect before , bad nute doses can act rapidly liek that as well , Plus theres never any harm in flushing really . but it is natural as well to have yellowing at this point, so it is a tough call. also could also be soil toxicity or whatever it's called ..... I dunno hahah when I'm stumped I just flush and start over hehe

 

[Mr. Bongjangles]

The burning at the edges of the leaves indicates an ongoing potassium deficiency, and the yellowing definitely looks like nitrogen deficiency, especially in the pic where you can see the location of the yellowed leaves on the plant.

Being that the yellowing happened overnight, I suspect it is either natural for this specific plant to start eating up those leaves at this point, or the plant has outpaced your feeding at least as far as N goes.

 

[TheHashAssassin]

The N thing looks like it could be from lock-out. I had this happen to me once before on a crop inside that i forgot to lime the soil before transplanting. I wouldnt worry about it too much at this stage since yu want that yellowing starting soon anyways, its not going to hurt your overall yield much and the end product should burn very nicely. Also on that crop I was using earth juice products as well, and one thing I learnt about the EJ is that when you first mix it up in the water it causes a severe pH drop. You need to bubble it for 24 hrs after mixing and will go back to normal.

 

[TheHashAssassin]

also you can cut the Bloom back to 1/2 strength of the bottle and that should help with the potassium burn on the edges of leaves in the 2nd pic.

 

[Weedhound]

They turned all that yellow color in one night?

 

[GHETTO_grower]

the reason I think its not deffeciency is the overnight remark that to me spells lock out or toxicity in the soil, the fact he just fed them a stronger dose than normal just reinforces my thoughts , N defic should be more subtle and slow than that , I usualy wind up with too mutch n

 

[midwestganja]

Here's an update. Nah I wouldnt say it happened totally overnight, but the burning on the edges of the leaves in picture 2 definitely happened overnight. The yellowing overall seemed to really happen in a 24-48hr period, so it was a short window.

Regardless, I think honestly after reading alot and speaking with a few folks and doing shit tons of more research, it's a variety of different problems combined into one -- flushing the soil is the best solution, which I did yesterday. Flushed it, picked up some cal-mag plus and some Meta-K also.

I'll keep ya'll updated and thanks for the advice.

 

[TheHashAssassin]

dont forget to bubble your earth juice too, with a aerator....

 

[Dirtfinger]

I'm just guessing based on what I see in the pics and some of the stuff I've seen in my own plants.

It's affecting new growth and not the old growth so it's not yellowing from maturation and it's not near enough to harvest for that anyway.

I'm kind of going on a hunch here but I'm guessing you've fertilized religiously according to the label instructions and haven't flushed out any of the old salts that are built up. I think you have a toxicity problem and I think the reason the burning showed up almost overnite is because they got a little too dry between waterings one time making the toxicity problem near lethal.

Give them a good flush letting some plain water run through and finish off with a weak fertilizer solution and you should see some major improvement within a few days.