Is this Nitrogen Deficiency?

[xswesx]

These plants are 2 weeks flower and I'm having leaves turn yellow then eventually curling up and dying. At first it started from the bottom of the plant and gradually progressed higher.

I know this is NOT a PH issue, ph runoff is 6.5.

Im growing in FFOF with 30% perlite. I may have been over watering (im pretty sure I did), does this cause Nitrogen lockout or any other lockouts?

I have been feeding them FF GrowBig these first 2 weeks and im still seeing these leaves yellow. I tried foliar feeding with GrowBig and it seemed to perk the plants up ALOT -- do you recommend I foliar feed with veg nutes? If so how often? BTW I only sprayed the yellowing bottom leaves

Does someone have recommendations on what to do to get these plants back on track before its to late?

heres what this plant looked like a few days ago, you can see it's gotten worse

 

[Mo. G]

what size light r u runin? looks a bit starved of nutes to me.what cha fedding it?

 

[xswesx]

400w HPS. I feed 1/2 TBS/gallon FF grow big and 1 TBS/gal Tiger bloom and 1TBS/gal big bloom during these first 2 weeks flower. Every other watering

 

[20north]

flush that out really good twice as much water as that pot can hold without soil is a good amount to flush with... i would do that and hows your humidity is it above 50% it could be mold/rot or something is locked out.. why are you using tigerbloom and big bloom doesnt it make sense to just use a basic feeding for the first two weeks get all those leaves off and clean out the inside of that plant all those shade buds should go because they are taking alot of sugar from the top buds good luck


are you using filter water like RO or distilled or anything like from a bottle

 

[pappy crukk]

guide for your sick plants

guide for your sick plants

at the top of cannabis infirmary there is a post for you //mynamestitch//

 

[xswesx]

at the top of cannabis infirmary there is a post for you //mynamestitch//

I've read that, and i;ve read many other threads on deficiency. Obviously something is wrong with my plants and im looking for someone to clearly tell me if this is some sort of deficiency, like nitrogen which I suspect, and how to fix the issue with a possibly overwatered soil.

 

[EvilTwin]

Hi XS,
Bummer about your plant. Overwatering does deprive the roots of oxygen and promotes root rot development. You've gotten back on track with the watering? With drying cycles?

In my opinion, trying to filiar feed would be a waste of time. You obviously can't keep that up the rest of the run. And it's not in danger of dying. Give them a good shot of veg food next time...something that's easily absorbed and used. You're early enough in bloom that any nutrients can be used up during the end flush. Actually I just looked up Grow Big. You using that full strength? I assume you know that that's a veg nute. That stuff should do the trick.
Good luck,
ET

 

[habeeb]

N and P

 

[xswesx]

Hi XS,
Bummer about your plant. Overwatering does deprive the roots of oxygen and promotes root rot development. You've gotten back on track with the watering? With drying cycles?

In my opinion, trying to filiar feed would be a waste of time. You obviously can't keep that up the rest of the run. And it's not in danger of dying. Give them a good shot of veg food next time...something that's easily absorbed and used. You're early enough in bloom that any nutrients can be used up during the end flush. Actually I just looked up Grow Big. You using that full strength? I assume you know that that's a veg nute. That stuff should do the trick.
Good luck,
ET

Yeah I think i've gotten watering down now, I got a moisture meter and used it once and found I've been overwatering a lot.

I'm feeding them 1/2 strength veg nutes alongside with the flower nutes every other watering. I've been doing this the whole time since 12/12 but I think the soil was to wet locking out the N.

When I foliar fed with 1/4 strength veg nutes the plants showed a lot of improvement overnight in terms of budsite areas. They were perking up like crazy, something I havn't seen in a while.

The only reason im foliar feeding is because I read that soggy soils lock out N so this is one of the only ways I can give the plant more N before the soil drys I assume? If there is a P def I may foilar with both veg and flower nutes at 1/4 strength, but i'm not sure if there is a P def like the last poster suggested.

any advice?

 

[EvilTwin]

xs,
The reason I'm down on foliar feeding is that it's stop-gap. Not a cure but a work around...and in bloom, you can only use it so long without risking budrot. So my main point is to fix the problem so your roots can absorb the food. Go ahead and foliar feed if it improves things...but it's not the cure.

I suppose you could have gotten some mild rootrot while you were overwatering. It wouldn't hurt to do a treatment program...just in case. Add some hydrogen peroxide to your water once a week. Just use 3% and maybe 15cc/gallon...double check on that dose. Do that for a couple of weeks. Or if you have a commercial rootrot tratment formula...even better.

I'm not so keen on using multiple nutrients like you're doing. You're clearly giving enough of everything and the plant isn't absorbing it and using it. That seems to be the problem...

Why don't you just give your straight bloom nutrient at full strength. Forget the grow and forget the bloom boost for right now. I'll bet your bloom nute has enough N. I suggest that just in case you're getting some interaction or ph issue from adding all three.

Are you phing your nutrient solution or checking anything? You should at least pick up an aquarium test kit at the pet store. Many nutrient lockouts are directly ph related.

I hesitate to suggest a flush like 20North suggested. His advice was good...but with your overwatering issue...a flush right now would just add to that issue.
That's all I can think of right now...
ET

 

[stillsmokin843]

yep what evil said cant tell ya about the nutes but when you over watter it will cause bottom leaves to do the same thing and work it way up the plant fix any over watering probs before any flush..
evil i would throw some more rep but its telling be to spread it around first. good luck man

 

[xswesx]

xs,
The reason I'm down on foliar feeding is that it's stop-gap. Not a cure but a work around...and in bloom, you can only use it so long without risking budrot. So my main point is to fix the problem so your roots can absorb the food. Go ahead and foliar feed if it improves things...but it's not the cure.

I suppose you could have gotten some mild rootrot while you were overwatering. It wouldn't hurt to do a treatment program...just in case. Add some hydrogen peroxide to your water once a week. Just use 3% and maybe 15cc/gallon...double check on that dose. Do that for a couple of weeks. Or if you have a commercial rootrot tratment formula...even better.

I'm not so keen on using multiple nutrients like you're doing. You're clearly giving enough of everything and the plant isn't absorbing it and using it. That seems to be the problem...

Why don't you just give your straight bloom nutrient at full strength. Forget the grow and forget the bloom boost for right now. I'll bet your bloom nute has enough N. I suggest that just in case you're getting some interaction or ph issue from adding all three.

Are you phing your nutrient solution or checking anything? You should at least pick up an aquarium test kit at the pet store. Many nutrient lockouts are directly ph related.

I hesitate to suggest a flush like 20North suggested. His advice was good...but with your overwatering issue...a flush right now would just add to that issue.
That's all I can think of right now...
ET

I have to agree with a flush not being a good idea. As for the Hydrogen Peroxide and root rot, I thought the same thing. I actually watered with some 3% hydrogen peroxide about a week ago (2 TBS a gal) just to be safe and didn't really see anything happen so I assume root rot is not an issue. I didn't use peroxide again because someone told me it kills the benificial bacteria that one of my nutes provides (FF Big Bloom).

The containers have plenty of drilled holes in the bottom and the containers are sitting on a corrugated plastic panel so there is plenty of air under the pots where the holes are.

Yeah I am PHing everything that I water these plants with a Hanna PH/EC meter. Everything is PH'd to 6.5. I mix all nutes and then PH, and had no problem mixing in all 3 and getting it to 6.5. I am using tap water though, it is roughly 160ppm. I'm almost positive this is not a PH issue because like I said I water with 6.5 and runoff is roughly 6.6ph. I think its safe to say PH is not an issue here. I even calibrated my meter every few days with buffer solution so I know it is exact.

the veg nutes (FF grow big) has 6% N and the flower (Tiger bloom) has 2%N so theres over double the N in the veg hence why I fed them that.

 

[stillsmokin843]

they make a product called zone for root rot not forsure if it works in soil though. quick question are your mixing the water well for each time ya add a nute part a and b i know if ya just add the nutes without shaking in between you will lock out some of the nutes jsut a thought.

 

[xswesx]

they make a product called zone for root rot not forsure if it works in soil though. quick question are your mixing the water well for each time ya add a nute part a and b i know if ya just add the nutes without shaking in between you will lock out some of the nutes jsut a thought.

Yep, I make sure I give the nute bottles a thorough shaking before using them. All bottles are stored in a cool dark place. Also I forgot to mention I am giving the plants 1 tbs/gal blackstrap mollases every watering.

 

[stillsmokin843]

i ment the water add one nute shake the water add another nute shake the water etc. the chemicals can lock themselfs out if added at the same time or atleast lock out some of the needed nutes

 

[xswesx]

i ment the water add one nute shake the water add another nute shake the water etc. the chemicals can lock themselfs out if added at the same time or atleast lock out some of the needed nutes

Ah, yes I add 1 nute at a time then mix into the water.

 

[EvilTwin]

XS,
Well, a more aggressive root-rot treatment might be in order. And on the nutes...don't matter diddly that you're giving 6% N since the plant isn't absorbing it.

If you want to foliar feed till you get a handle on this...N is mobile so you can spray it on all leaves and a couple times a day. Just don't spray on buds.
ET

 

[xswesx]

XS,
Well, a more aggressive root-rot treatment might be in order. And on the nutes...don't matter diddly that you're giving 6% N since the plant isn't absorbing it.

If you want to foliar feed till you get a handle on this...N is mobile so you can spray it on all leaves and a couple times a day. Just don't spray on buds.
ET

Thanks ET for your help so far

Foliar feed seems to be the only thing I can do right now until I get nutes absorbing again, I only do it right before lights out. Is it alright to do it during lights on or will the HPS dry up the solution and cause more problems?

Once I let the soil dry out thoroughly, should the plant start to absorb nutes again and foliar feeding become unnecessary?

 

[EvilTwin]

XS,
I've only used foliar on clones...but I've seen lots of people do it. Various opinions are: Don't do it during lights on because the droplets magnify the light and can burn the leaves. I don't believe that one. I used to mist plants lights on, and never burned leaves. To get enough N onboard...I think you'll need to do it more then once daily. Just be very careful that you don't spray and explode your HID bulb.

Hey, I've got this nagging feeling that maybe you should flush. This is my thinking. You've been giving a full nute regimen for a few weeks now and the plant isn't using it. So where are those nutrients? Probably stacking up in the rootzone. Does that make sense?

So flush the shit out of it...and during the last of the flush...include your root rot treatment. Then after you've let things dry....restart your feeding.

Personally, after the flush, I'd just give phed water. The soil has nutrients and you'll see greening once the roots recover and start working again.
ET

 

[hazy]

Very good advice from EvilTwin.
A Nitrogen factoid.
Low soil pH does not control Nitrogen, but limited microbial activity will slow mineralization of organic matter.
High soil pH causes loss of Nitrogen by volatilization.
Despite your runoff, your pH in the soil where those nutrients that are not being absorbed are 'stacking' as ET described may be off.
You could be leaching nutes by overwatering, usually shown by things like yellowing, iron defs and stuff. I do see some end branch growth that's yellow. Maybe your medium's pH is high and your losing N and locking out iron a little.
maybe
I'd go with ET's advice all the way.