Burnt tips, N tox or Light burn???

Hi, so i have burn tips on the top of section of one of my plants, seemed like a light burn but i moved the light further away and i'm still not sure if it might be N tox or not, maybe its both. Help would be highly appreciated, i will upload some pictures and a link to my growdiary so you can take a look at nutrient ammounts, time frame of when this happen as the pictures are high quality at 25mp, but the light height in the growdiary is not correctly set, i do a aproximation since some plants in the same diary are higher than others.

Thanks in advance for any help provided.

These photos are this past week from 1/Jun to 06/Jun.


For growdiary click Growdiary

I do not know if I understand good, but I would just put something under the smaler plants pot to make the canopy same height and than set the light according to the highest one. It doesnt seem to me as nut burn and they look nice.

Bukvičák said:

I do not know if I understand good, but I would just put something under the smaler plants pot to make the canopy same height and than set the light according to the highest one. It doesnt seem to me as nut burn and they look nice.

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I don't mean to bash what you just told me but the tips are turning yellow and then progressively brown, they are curling up, at the same time other leaves are begging to form "the claw"... seems to me that maybe there might be too much nitrogen and its burning them. I was wondering if maybe a partial flush with a hint of "clean fruits by Green Buzz" would be justified, once the soil is stripped of a portion of the nutes then i could maybe go from there, if the overall color would become lighter i could give some bloom nutes wich comes with some N but mostly K and some P. If after the partial flush they just stopped the tip burn wich is progressively becoming bigger then i would just water for 1/2 watering and reduce the nutrient dose by 30%.

Okay maybe you are right, but still... When you go nut burn it usually shows on all of the leaves in the same time, maybe mid part plants leaves show it the first and in your case I see only top top leaves burned. When it is nitrogen burn I think they will “claw” downwards and get wrinkled and turn dark green. Partial flush is probably only thing what you can do and I always say watch your runoff for more clues. Also try to adjust light. BTW which light you use?

Thats borderline N tox. It would be SOOOOO much better if you left the leaves on. That makes the diagnosis hard.
Its still the very beginning of the problem , so do NOT flush or anything, just dont give anymore food yet. water only once or twice. Could also be overwatering but it dont look like it. I am 100% its not light burn. Light burn is from not enough food an way too much light. it turns the tops whiteish.

besides the missing leaves , them girls look pretty good.

getogrow said:

Thats borderline N tox. It would be SOOOOO much better if you left the leaves on. That makes the diagnosis hard.
Its still the very beginning of the problem , so do NOT flush or anything, just dont give anymore food yet. water only once or twice. Could also be overwatering but it dont look like it. I am 100% its not light burn. Light burn is from not enough food an way too much light. it turns the tops whiteish.

besides the missing leaves , them girls look pretty good.

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What do u mean if i left the leaves on? I haven't defoliated, im sort of a newbie its just my second grow and i haven't tried defoliation yet, maybe its because i did 1 topping and spreaded out the 2 new tops, might be looking as if i defoliated.
The bud leaves are all droppy while the fan leaves are maintaining good health, except for the parts of the plant that are located at higher altitudes. I have raised the light and that may be allowing the plant to spend less N maybe keeping the issue for longer, should i move it back down to try and spend all that N?
But i find it weird that the tops are showing the tips burned meanwhile bud leaves all over the plant are really droppy and dark green.

Bukvičák said:

Okay maybe you are right, but still... When you go nut burn it usually shows on all of the leaves in the same time, maybe mid part plants leaves show it the first and in your case I see only top top leaves burned. When it is nitrogen burn I think they will “claw” downwards and get wrinkled and turn dark green. Partial flush is probably only thing what you can do and I always say watch your runoff for more clues. Also try to adjust light. BTW which light you use?

Click to expand...

Im using the phlizon "1000w" 245 real watts cree cob