Nitrogen toxicity issue???? Detailed With Pics.

I am having what I believe is a Nitrogen toxicity issue. The fan leaves are a very dark green and clawing. This is the only plant doing this and all have the same feeding schedule and is rotated in the garden regularly. What would be the easiest way to remedy ? Or do you think it is somthing else (I don't think it is a watering issue)

Medium - 50 / 50 mix of Fox Farm Ocean Forest, and Fox Farms Happy Frog in 6 gal air pots

Lights - 2 - 1000watt HPS (12 hour photo period)

Tent - 4x8x7

8' max fan pulling through 2 8" air cooled hoods ( on speed switch)

8 " can fan pulling through 24 " canlight carbon filter creating negative air pressure on an 8" filtered intake.

Nutes -
Root Zone mychrozae granular
Advanced Nutrients - Connoisseur (PH perfect)
Advanced Nutrients - Voodoo Juice
Advanced Nutrients - B52
Advanced Nutrients - Rhino Skin
Advanced Nutrients - Senzyme
Advanced Nutrients - Bud Blood ( 1st week only)
Advanced Nutrients - Big Bud
Advanced Nutrients - Bud Candy

Fed @ 1400ppm

Water, Water, Feed -Schedule

6.5 PH city water (aerated for 3 days prior to using)

Day temps 72 - 76

Night temps (low - mid 60's)

Average Humidity 40-70% (high right after lights off)

Strain - BlimBurn - Blue Berry Gum ( Blue Berry X Bubble Gum)

from seed..

Vegged aprox 65 days


26 days in flower

Yeah, it looks like 'the claw' to me. Is it required that it be on the same feeding schedule as the other plants? Might have to mix up some weaker nutes for that one.

Thanks for the reply MC130P

Ya I can try to weaken the nitrogen on this one, what is strange I have another same strain / same pheno type (grown from seed), I have heard the blueberry can be a nute picky girl and this one is REALLY smelling fruity, so I am thinking it is leaning more towards the blueberry pheno.

So should I just ride it out or should I flush? what is the remedy for Nitrogen toxicity?

Any ideas how to correct nitrogen issues?

how far are the lights away from the plant as the shiney leafs id a sign of heat issue and the plant can also claw from heat as well or taco

They are aprox 10 inches from lights, also lights are running in an 8" air cooled hoods. When lights are on I can place my hand against glass and if I had to guess I would estimate low 80's on the glass. at the end of veg first few days of flower I was having heat issues due to a combination of faulty air conditioner, and poorly executed exhaust set up, but that has all been corrected. My temps have been so good using just negative air pressure I have NOT been running my AC. So I think my temps are dialed in, good looking out though. Also, the shiny leaves could be a lighting anomaly from my camera as pics were taken just as lights went out. And the Dark dark green fans coupled with the clawing lead me to believe it's a nitrogen issue. But I could be wrong, I am after all a stoner.




Also, the shiny leaf could have been because as lights go out plants will aspirate raising Humidity in and around plants leaving them looking glossy, almost wet.

bumpiddy bump bump

NOone has ny ideas on how to correct Nitro Toxicity? Should I flush? Should I wait it out?

Its not up to the actual level of toxicity yet, or the leaves would actually start to brown and die off. If it was my plant I'd just wait it out and not feed any nutes with nitrogen. You could probably flush, and then resume normal feeding with very low levels (or none at all) of nitrogen.

Ya this is definatly N overdose,

You can flush, sure. the other option is to stop feeding nitrogen completely to that 1 plant until it works its way through.

This is happening to one of my plants, i feed it 0 nitrogen now, and have tried flushing and the problem persists, its a slow process, but as long as the leaves arent dying, your ok.

It sucks, but its not the end of the road either.

How will an N toxicity effect over all bud production? I have another Blueberry gum going right now (same Pheno type, but has triploidism (3 buds at bud sites instead of 2)) and is doing fine, other than being a darker green than usual (Nitrogen high in that plant as well) but not showing signs of clawing.)




Heres a shot of the other Blueberry Gum (same time in flower , same nutes, same water etc...) this was taken around day 20

Here are a couple of shots from today ( 27 days in)





The clawing is still bad but it looks to be getting a little better, some of the smaller fans seem to be straight.



These are from the other Blueberry gum from today,

Honestly, your plants do better to show how bad it is to starve plants of N in flowering than it does to show N toxicity. It's a bit high, but your plants look amazing without all the leaves turning yellow and falling off.

lerellion said:

How will an N toxicity effect over all bud production? I have another Blueberry gum going right now (same Pheno type, but has triploidism (3 buds at bud sites instead of 2)) and is doing fine, other than being a darker green than usual (Nitrogen high in that plant as well) but not showing signs of clawing.)




Heres a shot of the other Blueberry Gum (same time in flower , same nutes, same water etc...) this was taken around day 20

View attachment 2666138View attachment 2666139View attachment 2666137View attachment 2666136

Click to expand...

Very high N in early flowering can lead to smaller buds, over all stunted growth, and poor resin production. Not that it absolutely will, but it can.