Leaves turning brown & deteriorating PLEASE HELP!!!!!(SEE PICS)

my1stgrow

Well-Known Member
I'll just throw my two cents in the ring. Looks likes bugs to me, the ones you usually don't see, the little bastards are under the leaves and as they grow sucl the juices out of the leaves. This is very common in outdoor grows but should be treated before they get out of hand. Many times you can not see the larva very well without a microscope, but close inspection is needed to ensure this is or isn't the problem. Young larva can be controlled easily with many different treatments just depending on whether you lean towards the chemical solution or the organic control.
One thing I should add is that you will never grow plants outdoors which look as unblemished as those grown indoors, even with massive sprayings. Saying this, it just becomes more important to carefully inspect plants for bugs and then going to google and look at insect images for indentification. Preventative spraying I also reccommend to help, again chemical or organic both have solutions but whatever you choose I would advise to use the mildest solution possible for the present problem.
Good Luck and Happy Growing
Thanks canefan that's what I didn't wanna hear but however if it's a possibility then I guess I better suit up huh lol, so tell me do you think a simple neem oil solution would help or do I need something a lil more potent?
 

canefan

Well-Known Member
I haven't ever used neem oil on my girls, about every other thing on the farm I have with good results. This is just a personal thing though, many friends use it with great results. As far as something more potent, not unless you find this does not solve the problem. I think if you start with the least potent and most safe first you are ahead in the long run.
Your girls are nice and dense so the spraying and inspecting will be time consuming especially the first time through. While you are inspecting make sure to look for signs of catepillars, they can get out of hand quickly and do major damage. Just one of the necessary things you have to do outside or in a greenhouse.
Keep us up dated, hope it works and anything else I can do just PM.
Happy Growing
Cane
 

shagalicious

Active Member
too much heat

the burn on the leaf LOOKS a lot like too close to the light type burn, but you're in a greenhouse, so... too much heat

also, too little nitrogen - you've been feeding flowering nutes exclusively and are in week 2.5 - the plants stretch(veg) for the first 2 weeks of flower and burn up a lot of N creating new foliage - the flower nutes are low in N on top of this

prolly a mild cal deficiency as well

go ahead and flush the soil if you wanna just to be safe(won't hurt) but the next time you DO add nutes, use veg nutes and see if your plants don't green up overnight - LITERALLY, you will SEE the green PUSH OUT the leaves

get a bigger(or another) fan - lower that humidity or you're gonna be RAPED by mold

also, get some duct tape and cut some vents up high, if necessary to lower your heat - you MUST lower heat and humidity in there man

get those plants some nitrogen EVERY time the leaves fade

i feed veg nutes in veg and 50/50 my veg/flower nutes in flower, compensating where necessary

DO look for bugs, but thesed are all DEFINITELY issues as well
 

bluemagicman

Well-Known Member
Nope, I doubt it would be Co2 availability, I would agree with a a light flush however, and an off set ph will cause nutrient lock out not extra uptake, cal mag i doubt it, i had a problem with cal mag and literally every leaf will turn yellow, My final advice, get more ventilation, water with plain water and keep us updated.
 

my1stgrow

Well-Known Member
I haven't ever used neem oil on my girls, about every other thing on the farm I have with good results. This is just a personal thing though, many friends use it with great results. As far as something more potent, not unless you find this does not solve the problem. I think if you start with the least potent and most safe first you are ahead in the long run.
Your girls are nice and dense so the spraying and inspecting will be time consuming especially the first time through. While you are inspecting make sure to look for signs of catepillars, they can get out of hand quickly and do major damage. Just one of the necessary things you have to do outside or in a greenhouse.
Keep us up dated, hope it works and anything else I can do just PM.
Happy Growing
Cane
Ok I'll be in the garden right before lights out I'll let you if I come across something...
 

bluemagicman

Well-Known Member
Hi dude, I think you have more than one issue there. Iam leaning towards something like nutes being splashed on them! Mixed in with a calmag def and possibly a bit of nute burn. As mentioned, back off the nutes or maybe even a 2x pot volume plain water flush (not ph'd as this will make the plant absorb more nutrients) After this, if you can get some calmag, a light dose when watering would not hurt. Water, water, nutes @50%. Those temps will not be doing you any favours but I dont think that is the major issue, the big problem is air circulation and CO2 availability. Make sure you have air coming in and some circulation just in case mould develops. You dont want pm to ruin your crop. JMO W
Nope, I doubt it would be Co2 availability, I would agree with a a light flush however, and an off set ph will cause nutrient lock out not extra uptake, cal mag i doubt it, i had a problem with cal mag and literally every leaf will turn yellow, My final advice, get more ventilation, water with plain water and keep us updated.
 

my1stgrow

Well-Known Member
too much heat

the burn on the leaf LOOKS a lot like too close to the light type burn, but you're in a greenhouse, so... too much heat

also, too little nitrogen - you've been feeding flowering nutes exclusively and are in week 2.5 - the plants stretch(veg) for the first 2 weeks of flower and burn up a lot of N creating new foliage - the flower nutes are low in N on top of this

prolly a mild cal deficiency as well

go ahead and flush the soil if you wanna just to be safe(won't hurt) but the next time you DO add nutes, use veg nutes and see if your plants don't green up overnight - LITERALLY, you will SEE the green PUSH OUT the leaves

get a bigger(or another) fan - lower that humidity or you're gonna be RAPED by mold

also, get some duct tape and cut some vents up high, if necessary to lower your heat - you MUST lower heat and humidity in there man

get those plants some nitrogen EVERY time the leaves fade

i feed veg nutes in veg and 50/50 my veg/flower nutes in flower, compensating where necessary

DO look for bugs, but thesed are all DEFINITELY issues as well
i hear you on the heat and possibly cal deficiency but as far as lack nitrogen I find hard to believe because I did only give them earth juice grow til almost the 2 week mark then I finally hit them with the bloom nutes. So how do I go about correcting the cal deficiency?
 

my1stgrow

Well-Known Member
Nope, I doubt it would be Co2 availability, I would agree with a a light flush however, and an off set ph will cause nutrient lock out not extra uptake, cal mag i doubt it, i had a problem with cal mag and literally every leaf will turn yellow, My final advice, get more ventilation, water with plain water and keep us updated.
I'm not sure if you guys noticed but my green house is topless until lights out so I should be seeking a way to have air coming in, circulating and blowing out?
 

my1stgrow

Well-Known Member
A brief update... I went and inspected the plants and found no signs of bugs (not sayn I'm in the clear) I really don't think catapillers will be a problem where I'm located being that I only see about 2 butterflies a summer... Is there any other bugs I should look for, will treating my grass and surrounding bushes with orbits pesticide help keep any pest away?
 

canefan

Well-Known Member
The bugs will be very small, without good really good eyes you will want a small microscope to check the undersides of the leaves. Especially the plants showing the newest spots being affected. I could be wrong and hope that I am but worth looking closely at.
 

New Grower 420

Active Member
looks alot like ph problems to me man id invest in something to check your ph lvls that or heat are the 2 biggest things that jump out in my mind cause if it was a nute burn itd start from the top and go down. honestly i would keep a close watch on heat cause thats the biggest thing it could be in my mind. question did it start out with slight yellowing then got worse and turned brown? cause that would suggest a def if not it makes me think to much sun.
 

dannyboy602

Well-Known Member
dude u dont know how lucky u are. prune the dead shit out. and imho i would thin it out even more. the plants look great and keep doin wut ur doin. i wish i could grow outdoors. it IS the best place to grow cannabis
 

my1stgrow

Well-Known Member
The bugs will be very small, without good really good eyes you will want a small microscope to check the undersides of the leaves. Especially the plants showing the newest spots being affected. I could be wrong and hope that I am but worth looking closely at.
Ok guess I'll bring the scope out tomorrow...
 

my1stgrow

Well-Known Member
looks alot like ph problems to me man id invest in something to check your ph lvls that or heat are the 2 biggest things that jump out in my mind cause if it was a nute burn itd start from the top and go down. honestly i would keep a close watch on heat cause thats the biggest thing it could be in my mind. question did it start out with slight yellowing then got worse and turned brown? cause that would suggest a def if not it makes me think to much sun.
I'm leaning towards the sun or heat hoping it's not bugs, my ph levels are good and they haven't had much nutes... Thanks for the input buddy...
 

my1stgrow

Well-Known Member
dude u dont know how lucky u are. prune the dead shit out. and imho i would thin it out even more. the plants look great and keep doin wut ur doin. i wish i could grow outdoors. it IS the best place to grow cannabis
Yeah they do look pretty nice otherwise but by it being so early I really would
Ike to catch it if it is a problem that could possibly get worse you no...
 

bluemagicman

Well-Known Member
The bugs will be very small, without good really good eyes you will want a small microscope to check the undersides of the leaves. Especially the plants showing the newest spots being affected. I could be wrong and hope that I am but worth looking closely at.
What makes you think he has bugs? I'm just wondering because I didn't see any tell tale signs and i'm always looking to learn more
 
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