Nitrogen toxicity
- Thread starter Fish scale
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Fish scale
Well-Known Member
I don't mate, I checked the bottles and it just says 1% Nitrogen
Fish scale
Well-Known Member
1 thing I will say is that the fan leaves aren't clawing. It's only the leaves around some of the buds that are clawing. I have reduced my feed from 30ml of A&B to 26ml of A&B but if it is nitrogen toxicity how will I know it's getting better or not if the leaves are stuck clawing?
medidedicated
Well-Known Member
Heres my clones. I overfeed a bit but its 1.7ec is its sweet spot. Changing enviorment got it to lighten up. Box fans and low rh fed 12x a day now. Some have that claw look but theyre much darker than yours and dont think its toxic noones said so.
They say heavy N makes harsh smoke and this clone is harsh. That doesnt explain why other strains were fine same treatment no cure. Maybe someone good with organics could grow my clone and make it smooth smoke? Just a speculation.
They say heavy N makes harsh smoke and this clone is harsh. That doesnt explain why other strains were fine same treatment no cure. Maybe someone good with organics could grow my clone and make it smooth smoke? Just a speculation.
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Fish scale
Well-Known Member
Here's an overall picture of my plant that has the clawing around the buds. I couldn't fit the plant all in one picture because it is so massive. It's only the leaves around the buds that are clawing. None of the fan leaves are clawing. I've reduced my feed from 30ml of A&B to 26ml of A&B so hopefully it doesn't get any worse. If it does get worse then I will flush it with 10ml of A&B to remove any excess nitrogen and then start feeding normally again and reduce the feed down to 24ml of A&B. I'm pretty sure it's nitrogen toxicity because I have been feeding her pretty heavy, either that or possibly wind burn from my fan blowing on her??? She has only just started flowering so hopefully I can fix it in the next week or so.
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Nutty sKunK
Well-Known Member
Any strong air movement on the tops? That’ll cause increased transpiration and cause local N tox.
Leaves don’t become flat ime just need to watch the rest of the sugar leaves to see if they are still curling
Fish scale
Well-Known Member
Yeah I'm using a 9 inch fan on one of the tent poles and the fan is oscillating from left to right and it's directly blowing at the top of the plant where the clawing is happening. The fan has 2 settings and it's on the lowest setting. I have another plant in the other corner of the tent and that's getting the same amount of air flow from the fan and that's not showing any signs of clawing though. That's why I believe it is slightly nitrogen toxic? Since I have started feeding twice a day in flower the plants do seem like they are getting dark green for sure.
medidedicated
Well-Known Member
Heres it looking fine then dropped ec from 1.7 to 1.5 die to looking dark. Next pic shows it just started dying out. Many plants later I never drop ec and it finishes good. Id be careful dropping ec, I do .3ec reduced at first if its severe and then .2 ec or .1ec but for sure .1ec after Ive already dropped it from .3 to .2ec to now .1 ec at a time.
Basically to speed up results but not miss the window. So eventually just .1 ec at a time reduced if not Id just do .1ec reduced each time from the start. I needed to speed it up because I started flower and dont have much time. Luckily it was figured out immediately.
Thats a great feeling. People were telling me other things thats just the weird thing abut growing. Your plants look alright and when I get wind burn from boxfans its a different look let me see if I can find a leaf.
Basically to speed up results but not miss the window. So eventually just .1 ec at a time reduced if not Id just do .1ec reduced each time from the start. I needed to speed it up because I started flower and dont have much time. Luckily it was figured out immediately.
Thats a great feeling. People were telling me other things thats just the weird thing abut growing. Your plants look alright and when I get wind burn from boxfans its a different look let me see if I can find a leaf.
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medidedicated
Well-Known Member
medidedicated
Well-Known Member
I was thinking lately the boxfan airflow is actually making it use of the 1.7ec better. One run was super dark 8x a day fed but like shown it wont let you drop ec. Next run did 4x a day just playimg around. I got lighter growth but there was no box fan and rh was higher. Stagnant inside so molded but just saying about ec.
So the mold had me put up box fans and lower rh from 45-55 to 33-40rh with some 45rh peaks from portable ac idk why, Im not believing what I was told because it will only do it sometimes.
Anyway so 4x a day wont work if decked out rootball it slurps it up like a straw plus the enviorment. So it needs 8x a day less roots or 12x a day decked roots so was expecting super dark color but nope. Lighter.
So the mold had me put up box fans and lower rh from 45-55 to 33-40rh with some 45rh peaks from portable ac idk why, Im not believing what I was told because it will only do it sometimes.
Anyway so 4x a day wont work if decked out rootball it slurps it up like a straw plus the enviorment. So it needs 8x a day less roots or 12x a day decked roots so was expecting super dark color but nope. Lighter.
Fish scale
Well-Known Member
I'm using 2.6ml of part A per Liter at the minute. I was using 3.0ml per liter until I noticed the clawing.
Fatjoe
Well-Known Member
I hooked up a plant last year...no pun intended..lol.
I use jacks nutrients and I add calcium nitrate. This combination can lead to this mistake if ya overdoing it a little.
Slow recovery but with a nice flush. Something I rarely do. It did recover and finished flower. Wasn't the prettiest plant but it did finish.
I use jacks nutrients and I add calcium nitrate. This combination can lead to this mistake if ya overdoing it a little.
Slow recovery but with a nice flush. Something I rarely do. It did recover and finished flower. Wasn't the prettiest plant but it did finish.
Nutty sKunK
Well-Known Member
Is the other plant a clone or different strain? Each will have their limits for N tox.
Luckily N is the easiest to solve as it’s very soluble and can be washed out or not given so it uses up what’s in the media
Fish scale
Well-Known Member
It's the same strain but just a different pheno type. They were from seed.
Do you think I should flush her at 1/4 strength tomorrow to get rid of any excess nitrogen in the coco coir and then start feeding regularly again?
Or do you think the fact that I have reduced the feed from 30ml of A&B per 10 liters to 26ml of A&B per 10 liters will correct the issue?
The smaller plants are getting 20ml of A&B per 10 liters and they don't have any issues.
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Nutty sKunK
Well-Known Member
To be honest it’s not a bad N tox. Just slightly over her limit. I wouldn’t do anything too drastic and just watch new growth to see if it gets worse/stops. Still got some flowering left to sort it out!
How is the humidity in the tent?
Fish scale
Well-Known Member
The humidity is around 50 - 55%. 3 weeks into flower
Nutty sKunK
Well-Known Member
Ah Kk, was wondering cause if it was really dry you can up the humidity to make them transpire less.
I’d try lowering the amount of wind on them and reduce feed and monitor!
Fish scale
Well-Known Member
Sounds like a plan. I can lower or higher the fan but I can't turn it down because it's on the lowest setting. I guess I will higher the fan a little bit and keep the feed at 26ml of A&B for the moment and see how she gets on. I need to get a fan on the floor soon so there's air movement around the bottom of the canopy too because there is none at the minute. I plan on defoliating some more too.
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