Just wanted to show some pics for anyone looking to compare.
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late stage magnesium defeciency
- Thread starter stihgnobevoli
- Start date
M
medical_shed
Looks more like N deficiency to me man, maybe caused by salt buildup due to overfert? They look like the temps may be too high also.
Mg def is usually yellowing between the veins though sometimes I see yellow blotches on leaves, can't see any green veins there so that makes me think N.
Mg def is usually yellowing between the veins though sometimes I see yellow blotches on leaves, can't see any green veins there so that makes me think N.
Although upcurled leaves and yellowing are a sign of mag def, it also shows heat stress and low humidity....I do not agree with mag def and I do agree with med shed.
Kinda looks like rootbound issues with that yellowing.....how long have they been in that pot? There appears to be many problems.
Also, the dark blotches are P def....since you say they are late stage and the buds are so small and underdeveloped....this makes me think P def.
Of course, this is all speculation and if you want some more accurate diagnosis you need to fill out the sick plant form to give an idea of conditions, feeding strength and history, ph, etc etc etc.
Kinda looks like rootbound issues with that yellowing.....how long have they been in that pot? There appears to be many problems.
Also, the dark blotches are P def....since you say they are late stage and the buds are so small and underdeveloped....this makes me think P def.
Of course, this is all speculation and if you want some more accurate diagnosis you need to fill out the sick plant form to give an idea of conditions, feeding strength and history, ph, etc etc etc.
i wasnt asking for a diagnosis. i know its magnesium defeciency ive been watching it develop over the course of the past week or 2. and theres also some phosphorus caused by the lack of magnesium. i was just posting pics if anyone wanted to see what it looks like at the late stages when the leaves start drying up and falling off.
M
medical_shed
Yes I understood that from the initial post but the thing is Mg def doesn't normally look like that so someone wanting to know what Mg def looks like may be a little confused by the pics. Just to clarify this is what untreated Mg def looks like?
Presumably because they were so close to harvest it wasn't worth correcting, which is fair enough. What I don't understand is why he thinks it's Mg.HeadyPete said:
There seems an awful lot of confusion on this site between N, Mg and K deficiencies, presumably because they all involve a certain amount of leaf yellowing, but they do it in quite different ways. N, is the only one where the leaf will turn fully yellow, the other two always involve a certain amount of green leaf with the yellowing. Mg does it from the tip of the leaf and works backwards towards the leaf apex and the leaf tip will turn necrotic long before the yellowing even gets half away up the leaf. K yellows around the leaf edges, leaving the middle of the leaf green.
M
Mr Stinkweed
Clearly not a Mg def....
generally if you are paying attention the first signs of Mg def will not be at the top nor the bottom.... but a node or two under the growing tops...
it will show as faint interveinal chlorosis..... it should be more pronounced the next node.....
This is because Mg is a mobile element..... however not as mobile as N.... which the plant can easily translocate from the lower leaves....
In my experience K def is normally necrotic margins and tips rather than chlorosis....
what this looks like to me is.... low ph...... causing too many metals too available to the plant....
If it were as simple as N def the plant would probably look more healthy with the yellowing leaves looking healthy just yellow...... too much ugly going on here to be simple N def....
generally if you are paying attention the first signs of Mg def will not be at the top nor the bottom.... but a node or two under the growing tops...
it will show as faint interveinal chlorosis..... it should be more pronounced the next node.....
This is because Mg is a mobile element..... however not as mobile as N.... which the plant can easily translocate from the lower leaves....
In my experience K def is normally necrotic margins and tips rather than chlorosis....
what this looks like to me is.... low ph...... causing too many metals too available to the plant....
If it were as simple as N def the plant would probably look more healthy with the yellowing leaves looking healthy just yellow...... too much ugly going on here to be simple N def....
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the diagnosis was mag def at the late stages like i said in the beginning i know because i allowed it to develop from an early stage. and that was not the top of the plant as someone earlier suggested that's actually the middle and lower part of the plant i had it trained over the top of the pot to one side.
Just wanted to go ahead and reiterate that this is magnesium. i've seen it many many more times in the 6 years since i wrote this originally.
your first indication is the topmost leaves/ newest growth starts to cup up like V shapes, the serrations on the edges of the biggest fan leaves closet to the middle will start to tip up some.
later stages when most people catch it is when the lowest oldest fan leaves start getting interveinal chlorosis. yellow leaves with green veins that don't fall off the plant. Nitrogen def is the opposite. Green leaves with fading starting at the veins leaves can be pulled off as soon as they start fading.
your first indication is the topmost leaves/ newest growth starts to cup up like V shapes, the serrations on the edges of the biggest fan leaves closet to the middle will start to tip up some.
later stages when most people catch it is when the lowest oldest fan leaves start getting interveinal chlorosis. yellow leaves with green veins that don't fall off the plant. Nitrogen def is the opposite. Green leaves with fading starting at the veins leaves can be pulled off as soon as they start fading.
Midwest sticky
Resident Smartass & midget connoisseur
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Cat Jockey
Member
Hmmm ... this is an old thread that someone dug up. Thanks for doing that, for the OP was kinda of a dick to me in another thread, going as far as to insinuate I was lying about my experiences.
Holy Shit whatever your name is OP, wtf are you talking about in this thread? It's okay to make mistakes like this in diagnosis back in 2008, but 6 years later, you are still wrong as hell and trying to defend that wrongness.
Some of your wrongness:
your first indication is the topmost leaves/ newest growth starts to cup up like V shapes, the serrations on the edges of the biggest fan leaves closet to the middle will start to tip up some.
Wrong. Mg is a mobile element in the plant. As such, the Mg needs of new growth will draw upon the stored reserves in older growth if it is not present in enough quantity in the rootzone. Your first indication of a Mg def, generally, will show up in OLDER growth first. Just like N,P & K.
Those pictures in your last post, well, I DON'T want some of what your smokin', cause the shit obviously ain't weed. It is some kind of Stupid Plant you are smokin' or something, making you say stupid shit.
You told people to not listen to me in another thread as, according to you, I didn't know wtf I was talking about. You also questioned my honesty.
And then I come across this thread from you? L - the fuck - OL.
So, to return the favor, I am going to go ahead and tell anyone that stumbles across this thread to not waste in of their RAM in their brains thinking about it, cause you just don't know wtf you are talking about and have misdiagnosed pretty much every damn picture you have thrown up.
More reading and less posting, whatever your name is, for you obviously do not know, nor have the expertise, you claim, and I hope that people don't get fooled into thinking that a registration date of 2007 makes you an Old Timer and 5,000+ posts an expert.
Again, L - the fuck - OL.
Holy Shit whatever your name is OP, wtf are you talking about in this thread? It's okay to make mistakes like this in diagnosis back in 2008, but 6 years later, you are still wrong as hell and trying to defend that wrongness.
Some of your wrongness:
your first indication is the topmost leaves/ newest growth starts to cup up like V shapes, the serrations on the edges of the biggest fan leaves closet to the middle will start to tip up some.
Wrong. Mg is a mobile element in the plant. As such, the Mg needs of new growth will draw upon the stored reserves in older growth if it is not present in enough quantity in the rootzone. Your first indication of a Mg def, generally, will show up in OLDER growth first. Just like N,P & K.
Those pictures in your last post, well, I DON'T want some of what your smokin', cause the shit obviously ain't weed. It is some kind of Stupid Plant you are smokin' or something, making you say stupid shit.
You told people to not listen to me in another thread as, according to you, I didn't know wtf I was talking about. You also questioned my honesty.
And then I come across this thread from you? L - the fuck - OL.
So, to return the favor, I am going to go ahead and tell anyone that stumbles across this thread to not waste in of their RAM in their brains thinking about it, cause you just don't know wtf you are talking about and have misdiagnosed pretty much every damn picture you have thrown up.
More reading and less posting, whatever your name is, for you obviously do not know, nor have the expertise, you claim, and I hope that people don't get fooled into thinking that a registration date of 2007 makes you an Old Timer and 5,000+ posts an expert.
Again, L - the fuck - OL.
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