Is this nute burn or heat stress???

Logan Burke

Well-Known Member
Well, right off the bat I can see at least one or two leaves 'clawing'...which is usually related to having to much nitrogen. And some leaf tips pointing straight down. I'm not seeing any raised edges on your leaves, or canoeing, are those the leaves that are closest to the light?...
*EDIT* Also, what kind of light do you have? What are your temps?...The more details the better...
 

Sirdankz

Well-Known Member
Well, right off the bat I can see at least one or two leaves 'clawing'...which is usually related to having to much nitrogen. And some leaf tips pointing straight down. I'm not seeing any raised edges on your leaves, or canoeing, are those the leaves that are closest to the light?...
*EDIT* Also, what kind of light do you have? What are your temps?...The more details the better...
300w hps and the temp is 72-85f and no these arent the closes to the light.
 

jellero

Well-Known Member
2E01A399-583C-4730-8234-273A654C5148.jpeg i am having a similar problem on one plant. the leaves are twisted upside down. the leaves are discolored on top and they dry up without wilting, just flip over and dry up.
under microscope i did not see any bugs but leaf covered with small circles. first thing the tips turn brown and curl up. we did have a couple frosts that killed some flowers near it but no wilting on mj plant. i hate to cut this one... bio chem. i was really lookng forward to this one. johView attachment 42010732E01A399-583C-4730-8234-273A654C5148.jpeg
 

Blitz35

Well-Known Member
She may be a slight bit underfed, but nothing major appears. That burning mark seems to be the only one, so maybe some water stayed there and caused a burn?
 

InTheValley

Well-Known Member
View attachment 4201074 i am having a similar problem on one plant. the leaves are twisted upside down. the leaves are discolored on top and they dry up without wilting, just flip over and dry up.
under microscope i did not see any bugs but leaf covered with small circles. first thing the tips turn brown and curl up. we did have a couple frosts that killed some flowers near it but no wilting on mj plant. i hate to cut this one... bio chem. i was really lookng forward to this one. johView attachment 4201073View attachment 4201074
Just extremely hungry, It is deficient in everything. Also, the twisting could be wind burn. If its near an outtake, the leafs get windburnt from the hot air flowing past it.

But looks like severe Cal-mag and severe phosphorus deficiency
 

InTheValley

Well-Known Member
Sirdankz,
yeap, like Logan said

To much nitrogen, flush, ( not soak, just water with just calmag 2ML) on regular schedule you usually water on.
 

Logan Burke

Well-Known Member
I'm just not seeing temperature issues here.


As you see here, nitrogen toxicity normally involves darker green leaves. I'd do what Blitz said, Cal-Mag should darken them up if that's the issue. Can be a problem in flower though, so watch out.
 

Logan Burke

Well-Known Member
View attachment 4201074 i am having a similar problem on one plant. the leaves are twisted upside down. the leaves are discolored on top and they dry up without wilting, just flip over and dry up.
under microscope i did not see any bugs but leaf covered with small circles. first thing the tips turn brown and curl up. we did have a couple frosts that killed some flowers near it but no wilting on mj plant. i hate to cut this one... bio chem. i was really lookng forward to this one. johView attachment 4201073View attachment 4201074
How much are you feeding? I normally have to cut back on ferts towards mid-late flower because my leaves start getting necrosis like that and turning crispy. Seems to worsen with higher temps as well.
 

CannaCountry

Well-Known Member
Your plant is hungry. Remember, clawing leaves are not wholly correlated to an N toxicity. She needs to eat. And for the love of God, don't 'flush'! Feed her, be sure she's getting the proper amount of water (not too much and not too little...just right) and relax. Be sure, if she's in flower, not to feed anything too high in N...but don't skip out on N either.
 
Top