Is this nute burn?

Let me know what you think this...

plants are four weeks old
ppms at time of pic taken is 1200

Looks like it - back off a bit on your nutes.

burnt, empty tank, ph 5.6 flush for a few days, ppm well too high, when refill half nutes and try 2 keep around 500ppm then build back up

take it you ebb & flow, aim for max 1200 ppm, anything over causes issues m8

I thought I saw a calcium deficiency in there several times.... yes, I see the burnt tips as well, but look at the serated edges....

I would just say its been over fertilized, leafs curled under is a pretty good sign especially when they are burnt at the tips and sides. PPM 1200 is a lot for 4 week old plants.

Just curious, what nutrients are you using?

Yeah definitely back off a bit. I never find the need to go over 1000ppm, and my plants smell and taste better then when I used full strength nutes. 1200ppm Is about the highest I'd want to go before flushing not for a 4 week plant.

+rep to you guys if I knew how. If you tell me I will.

I'm just wanted to make sure that it wasn't a deficiency before I throw them into flower. Your'e right about it being ebb and flow though.

Here are some other pics. Serapis, think it could be a calcium nute lock out due to excess of magnesium or iron?

I use heavy16's as a base and follow their advance feed schedule (http://www.heavy16.com/products.html) exactly when it comes to additives. My ppms won't get as high during flowering tho. Before someone says "you don't need all that crap for a great harvest, your'e throwing money down the drain, blah blah, blah", I understand what your saying. I'm just trying to push the genetics to their absolute limit just to see what they are, so please, don't lecture me about it haha.

I understand the desire to push plants to their limits, we wouldnt have dank ass bud today if we didnt! I use advanced nutrients 3 part with a little snow storm ultra, bush master, and super thrive when needed. I personally havent found much of a reason to buy these companies 12pt solution but to each their own.

the leaf fringes have obvious signs of deficiency however i may be mistaken but leaf curling usually doesnt go hand in hand with calcium deff. If your humidity is nearly 100% or you foliar feed frequently *daily* this may be the problem but i doubt it. If anything it looks more like a Potassium deff as it shows multiple signs but overall with the nutrient solution soo high the plant is bound to show signs and make it easy to misdiagnose.

I have seen some of these companies feeding schedules and i urge you to take them with a grain of salt. I also hope that you are using your nutrient's company's conversion rate of probably 700:1 as most are.

To give rep, find the 6 point star under said users avatar next to "Journal this post"

bump for serrated edges being burnt, seeing the same prob, too much nutes or some kind of deficiancy?

lowered the ppms by 200 and it seemed to correct it. So either solely nute burn or that with a combination of lock out of calcium due to excessive magnesium or iron.

Briester Behemoth said:

Let me know what you think this...

plants are four weeks old
ppms at time of pic taken is 1200

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with that dark green colour and burning of the margins its over fert with N.Flush before flowering wait a week and use flowering nutes from then.