Is this N toxicity

Hi everyone I have been battling with two of my plants since day 1. They have had many problems including overwatering and nutrient deficiencies. Over the past 2 weeks I have been trying to get them to just thrive but they are just so sensitive. Anyway I have been watering when the pots are very light and dry. But now I think one of my plants is having another issue. I don't think it is overwatering because I don't see how it is possible at this point. I have been letting them dry out almost to the point of dehydration so I don't overwater again. I feed nutrients once a week using flora nova grow nutrients. I am also watering once a week using a compost tea, following fresh water.



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I've been looking up nute burn myself today cos mine have a touch of it and yours looks to have the same signs, plus the claw, which I've read is from N toxicity so it looks very likely to me but I'd wait for someone with much more experience than me to chip in before you act on it!

Natural light pics would help a great deal. Is that nute burn on that front left leaf, first picture?

Could be overnuting, yeah. Flush with pH'd water and maybe feed 1/4 dose grow nutes, but I'd just do the water and counter deficiencies if they crop up.

Make sure your pH is good.

If you have a pH meter and a TDS or EC meter, get your runoff numbers.

Better pics might help.

Sorry here are some better pics



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Temps humidity run off ph 1/4 1/2 full strength nutes? But to answer the first question I vote nay on nitro tox too bright green not anuff burnt tips could be the opposite but not anuff info

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This might help

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Could be a lock-out from ph being off. Like 420monster stated, there's no burnt leaf tips which is usually a\the first sign of too much nitrogen

Looks like overwatering/nute burn causing n and k lockout as well as a bunch of other deficiencies. Look like the soil may have become too compacted as well.


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Humidity is at 23% and the water ph is 6.5 but I have not tested the soil ph. I don't see how overwatering is the case anymore. If I let hem dry out any further between watering a they will most def fall over from dehydration. My temp is always at 76% and I have a small circulation fan in the tent. If it is nute lockout should I flush now even though they were just watered with a compost tea last night?


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I also feed them 2.5 ml of flora nova mixed in 1 gallon of water.


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I found this very helpful: http://www.thenug.com/galleries/diagnose-your-sick-marijuana-plants

I have looked at many charts and copper deficiency and nitrogen toxicity were the two that resembled my leaves. In the second picture I posted you can see how the very top leaves and curled down quite a bit at the top while the bottoms leaves are curling upwards and are more yellow. This is what is confusing me the most on what the problem is


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Classic N tox 100% probs getting worse with the long dry out period amount and frequency be your focus depending on conditions this is changing

blue...yum said:

just watered with a compost tea

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blue...yum said:

I also feed them 2.5 ml of flora nova mixed in 1 gallon of water.

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do one or the other. compost tea is nutrients, flora nova is nutrients= overfeeding

rkymtnman said:

do one or the other. compost tea is nutrients, flora nova is nutrients= overfeeding

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Ok I was under the impression that a basic compost tea isn't very strong nutrient wise. I thought it was more or less just an added little pick me up for the plants. Good to know now. So then should I do a flush and leave them be for a few days


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rkymtnman said:

do one or the other. compost tea is nutrients, flora nova is nutrients= overfeeding

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Also last night is when I gave them the compost tea, 3 days before that is when I fed the nutrients. In between waterings and feedings I always give the foliage a very light, water only spray twice a day.


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blue...yum said:

Ok I was under the impression that a basic compost tea isn't very strong nutrient wise. I thought it was more or less just an added little pick me up for the plants. Good to know now. So then should I do a flush and leave them be for a few days


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i don't do soil but a lot of growers here pre-load the soil with all necessary nutes and just add water for the rest of the grow.

skip the water spray too. that's what roots are for.

Looks like copper deficiency to me!! But I am having same issues and falling on that myself. Any help further with yours would be great help to me bc ours look the same, mine are just a lot bigger.

What's the source of the compost? Did it cook off fully?

I leant towards the soil holding water, getting compact and not draining.

I also have a feeling that compost tea is hot and may throw pH off to. Got to go easy on that stuff.

Pick one way or the other. If synthetic, then use that. If wanting to use teas and compost just build a good soil and ditch the bottles.

They were looking great the first 3 days after watering. Now today they are very droopy, and got some paleness in the new growth from the stem out and on some older but still new leaves but from out edges in. I was thinking copper but changed to more likely potassium or zinc or molybdenum deficiency (it gets cold at night 60 degrees under the lights so roots are probly like 50). I can take a lot more photos juat trying to fix this before I flower in a couple weeks. Got 13 1'-1.5' foot tall ladies here from seed I'm trying to finish strong.