Nitrogen toxicity?

Hello guys, so i'm in my 5 week of flowering with my 2 girlz




As you can see only the plant to the left has some of the darkest leaves, meanwhile the plant on the right is lookin good with bright green leaves....

Details below are taken from the left plant, and as you can see som leaves are curling becomin more green and pointing down







I'm quite sure it's a nitrogen toxicity, however i'm feedin them with plagron nutrients, alga bloom(3-2-5) and green sensation(0-9-10)....
So if i want to lower nitrogen for the plant i just have to add less bloom for the left plant right?

Sorry im a little confused about what you are asking.
You want to not give nitrogen to the plant that may have symptoms of N+ toxicity?
Then, yes, not feeding with the algabloom would be a wise move. Also most mineral supplements cal-mag, iron and some potassium are nitrate based FYI. Nitrate causes the toxicity by mineralization in the soil, becomes a salt.
You could also flush well with water, or increase mircobes to convert nitrate to urea or ammoniacal N+ which flushes super easy and doesn't cause toxicity.
Also consider the soil pH being too low. The clawing, curled leaf is also sign of low pH. If so dolomite lime will fix things up nicely. Will raise pH and provide calcium so that nitrogen in tissues can be used for protein synthesis or get it mobilized to leaf surface as a salt.
Dark leaves are also a sign of too much potassium and or iron as well. Nitrate toxicity usually has a bronze color to leaves.

No the ph should be fine i check it every feed to be near 6,5.
For the watering/feeds i add 50% demineralized water mixed with 50% tap water + CalMag solution for that 50% demineralized water....

This CalMag if i'm correct it has a lot of nitrogen (4-0-0) along with som other micronutrients as you can see



Or maybe it could be that the pot (26L Smart Pot) is oversaturated with som leftover nutes, because when i usually water the plants, the water doesn't flush down the pot... it just remains a little humid at the base of the pot...

Should i bother about that? Maybe since it's a smart pot the water flushed down gets instantly reabsorbed by the pot itself....

Sorry for the amount of confusion but this is my first grow and my first time using a smart pot...

She just looks a lil over watered ....no big deal , i would back off the N and the water just a tad. looks good other then that.

getogrow said:

She just looks a lil over watered ....no big deal , i would back off the N and the water just a tad. looks good other then that.

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Dude i can assure you it's not overwatering, i can tell that because just before watering day the fan leaves are light and droopy,then a couple of hours after watering they stand back up again so maybe i should add more water.
Also because right now i'm giving them just 2L each plant every 2 days in a 26L pot...

By the way, Calcium nitrate and Magnesium (Epsom salt) are literally the easy to find and cheapest powder fertilizers on the market.
Always wonder why do people like to buy expensive snake oils...

I dont like that brand of kelp. Its more chemicals than kelp, kinda fraudulent to put kelp on the label. Ditto for max-sea lol.
Yes that's heavy in nitrate. I commonly see problems with that product in other people's plants. Its not intended for every feeding use. Once or twice to fix iron deficiency really. More for roses and citrus trees.
Stop using that. Top dress with dolomite lime, that will get you cal and mag, and will buffer pH up (nitrates acidify) but not past 7.0. And just water for a while till it gets healthy.

And yes more water. Give it 2 cups every 15 minutes till run off thru bottom of bag. If you gave say 1 gallon all at once it would likely pool on the top of the dried soil and run down and out thru the side of the bag as the soil can contract a bit from side of pot.

Recently had a N toxicity issue. Dunno what lines are available to ya but Advanced Hydroponic is 0-5-3.5.

rufus01 said:

By the way, Calcium nitrate and Magnesium (Epsom salt) are literally the easy to find and cheapest powder fertilizers on the market.
Always wonder why do people like to buy expensive snake oils...

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First grow, i asked for calmag the idroponic seller gave me this so...

Snoopy808 said:

I dont like that brand of kelp. Its more chemicals than kelp, kinda fraudulent to put kelp on the label. Ditto for max-sea lol.
Yes that's heavy in nitrate. I commonly see problems with that product in other people's plants. Its not intended for every feeding use. Once or twice to fix iron deficiency really. More for roses and citrus trees.
Stop using that. Top dress with dolomite lime, that will get you cal and mag, and will buffer pH up (nitrates acidify) but not past 7.0. And just water for a while till it gets healthy.

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Damn i'll not use that then.
Just for now i'll use only tap water or 50/50 tap and demineralized without adding calmag fix,i'll buy another one when i got the chance....
So can i use 50/50 without adding calmag fix or i need it anyway?

Its been a few days. Hows the plant look? Not asking if the leaves are still curled, but overall look of plant?

You have used the kelp, so lay off for a while. Its not the kind of kelp for weekly use. I rechecked and it says so on your label.
You dont really have a cal-mag issue.
I dont know what cal mag you got. No pic or info. But likely its nitrate based and kinda not helping your issue.
50/50 water mix. Whats wrong with your tap water?

Snoopy808 said:

Its been a few days. Hows the plant look? Not asking if the leaves are still curled, but overall look of plant?

You have used the kelp, so lay off for a while. Its not the kind of kelp for weekly use. I rechecked and it says so on your label.
You dont really have a cal-mag issue.
I dont know what cal mag you got. No pic or info. But likely its nitrate based and kinda not helping your issue.
50/50 water mix. Whats wrong with your tap water?

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My tap water is 300ppm, i just mix it with demineralized water to lower EC but most importantly because i'm scared of chlorine that's in every tap water of every house...

I don't know if that's good for the plants,but keep in mind that i live near mountains, my water comes from the main source of the mountains so it should be clean and pure, but chlorine is always added i think.

Right now they're doin fine except this little leaf problem on the other plant




As you can see this leaf is starting to get brownish between the veins of it.... Could be ph fluctuations? But damn i always kept it around 6,50 with a tester...
As far as i've seen this problem is mainly on this leaf

Dr. Frescho said:

Hello guys, so i'm in my 5 week of flowering with my 2 girlz


View attachment 4506354

As you can see only the plant to the left has some of the darkest leaves, meanwhile the plant on the right is lookin good with bright green leaves....

Details below are taken from the left plant, and as you can see som leaves are curling becomin more green and pointing down

View attachment 4506355


View attachment 4506356View attachment 4506357View attachment 4506358


I'm quite sure it's a nitrogen toxicity, however i'm feedin them with plagron nutrients, alga bloom(3-2-5) and green sensation(0-9-10)....
So if i want to lower nitrogen for the plant i just have to add less bloom for the left plant right?

Click to expand...

Stop using the call mag in flower ........veg yes flower no.

That one faded plant could probably use some epsom salt added to it.

I think you could stand to shed a few leaves to get air flow going and to get light on the bud sites .

If you have a local water company adding chlorine to the water supply you should be able to get a copy of their water testing. Your plants had some N toxicity, not sure what's causung the yellowing. I never saw a ph meter I could trust so I would question that.

if its not overwatered then i believe its the extra calmag. Thats too much iron , calcium ect... let alone nitrogen. They look pretty good overall just back off that calmag an you should be fine.

its literally impossible to change the ph in a container in a couple months so lime is about all we have. Its hard to overdo dolomite lime so its almost always good to use it. no need in ph'ing your water/food. it wont change anything but it might hurt things. What kind of soil ya usin?

getogrow said:

its literally impossible to change the ph in a container in a couple months so lime is about all we have. Its hard to overdo dolomite lime so its almost always good to use it. no need in ph'ing your water/food. it wont change anything but it might hurt things. What kind of soil ya usin?

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i'm usin Biobizz Light mix with 6,5 ph

biobizz is pretty much peat moss and its empty on food. So you gotta feed more then organic guys but still not so much different. I still think too much N which is the cal mag.
Ph dont tell me anything. you cant change it and there is no way to properly test it. There is absolutely nothing you can do if the ph is off. (its not) I dont think biobizz has lime an thats scary but if you only used it once then its fine. Last i checked , the ph of peat moss is way too low but i might be wrong on that. later on in life someone said speahgam peat is closer to 6. As regular peat is closer to 5.
Put some lime in that mix if ya got it on hand.

Looking stanky brother! Are you testing EC or TDS, if so what are the numbers?

happy Growing