What is that??

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kajanas

New Member
Hey guys,

Can u guys help me find the problem:
1) what are those tiny brown dots on the right, there are more of them on the plant. Also it has those purple branches.(blueberry auto)
2) and the other one have a little hole? I was searching for the problem but could not found it..

Thanks for any help guys!
 

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CookieKush

CookieKush

Well-Known Member
Calcium & Magnesium deficiency is one of the issues for sure. Get some Sensi Cal-Mag Extra immediately to treat that plant if you want it to live.
 
CookieKush

CookieKush

Well-Known Member
The other question, did your grow room / area drop in temperature recently from high to low temps? that can also be a cause of the purple stem along with Potassium issues as well.
 
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Blitz35

Well-Known Member
That is clear cut magnesium missing, which is affecting the uptake of phosphorus and causing the purple stems. At this stage in flowering, you are near the end, you don't need the cal-mag as calcium isn't missing and the plant uses less of it at this stage anyway..it needs magnesium and cal-mag is more cal than mag. Your better option would be epsom salt as it also contains sulfur and both are wanted now more so than calcium (though dont leave it out lol).
 
CookieKush

CookieKush

Well-Known Member
Blitz35 said:
That is clear cut magnesium missing, which is affecting the uptake of phosphorus and causing the purple stems. At this stage in flowering, you are near the end, you don't need the cal-mag as calcium isn't missing and the plant uses less of it at this stage anyway..it needs magnesium and cal-mag is more cal than mag. Your better option would be epsom salt as it also contains sulfur and both are wanted now more so than calcium (though dont leave it out lol).
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So basically use Cal-mag then lol :P
 
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Blitz35

Well-Known Member
He can if he wants, but maybe there is already enough calcium in there and it's locking magnesium out? The only issue there is magnesium, the plant is not short on calcium..no point to add something the plant isnt showing it needs more of, especially at a time when she really doesn't need the calcium anymore.
 
polishpollack

polishpollack

Well-Known Member
kajanas, are you able to put up a pic of the leaf yellowing that is close up to the leaf? I'd like to see that yellow spotting better. also, you need to put up more info, how large are the pots, what kind of soil, are you adding fertilizer? You need to tell more so people can help you properly.
I don't know how people have the idea that one nutrient locks out a different nutrient. How did this idea develop?
 
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Blitz35

Well-Known Member
polishpollack said:
kajanas, are you able to put up a pic of the leaf yellowing that is close up to the leaf? I'd like to see that yellow spotting better. also, you need to put up more info, how large are the pots, what kind of soil, are you adding fertilizer? You need to tell more so people can help you properly.
I don't know how people have the idea that one nutrient locks out a different nutrient. How did this idea develop?
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You have never heard of an element reaching toxic levels and thus locking out another element? Read up on anions and cations and cec, it will give you a better understanding of how elements behave with one another. Calcium for example has a much stronger attraction to the negative particles in your medium than does potassium or magnesium or even phosphorus...having too much calcium as an example, would not allow other elements on to exchange sites in your medium as none of them would be strong enough to bump calcium off and replace it. Calcium generally will/should, occupy most of the cec sites, however it can be too much. Say you have too much P in your medium, that would compete with the likes of iron, copper, zinc and manganese, with the former having a higher attraction to the negative particles, the latter would not have a place to 'stay' and thus P would create a lockout of these nutes. If you have ph issues, then the elements will bond with one another and create an insoluble new compound. If ph is too high, phosphorus will bond with calcium or magnesium to form a mostly insoluble compound and the plant wont be able to use either. If ph is too low, P would bond with usually aluminum or iron, again, to create something the plant cannot use. Plants will uptake a specific amount of cations and anions..think of it like a 'highway' for nutrients, but there is a limit as to how many ions can pass through. The plant can't tell the difference between one cation and another, it will simply take up what's there and whoever comes in first (has strongest attraction). If elements are out of whack, then too much of one will go in and not enough of another..eventually the left behind elements build up in your medium and start locking others out. If nothing else is available to eat on, cannabis will prefer to take potassium, as that's the 'favorite' food for her. This is not an 'idea' that was 'developed' lol...it's plant biology! :)
 
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Blitz35

Well-Known Member
tstick said:
Are the brown dots moving?
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I didn't see any brown dots either. All i saw, was in pic 2 the little brown hairs 'in the elbow'? That's a pistil that has matured and turned from white to brown, like on the buds. Not sure what other brown spots there were. I'd be more concerned about the magnesium deficiency!:)
 
greg nr

greg nr

Well-Known Member
CookieKush said:
So basically use Cal-mag then lol :P
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There is a product called sweet that has mag and sulphur, plus some sugars. It's a better blend for late flowering than calmag. As noted, you don't need calcium at this stage.

There are seral brands, that's just a popular one.

I didn't look at the pics so I'm not making a rec for this grow, just a general note.
 
polishpollack

polishpollack

Well-Known Member
I guess what I was trying to say is that I'm mystified by statements here that can only be called guesses. Maybe this, maybe that, maybe calcium, maybe magnesium. I don't understand why people respond to threads with guesses when the OP hasn't put up any significant info to speak of. Without close up pics of those leaves, I don't know if it's mag def or not, and I've seen this problem close up before so I know what it looks like. The yellowing seen could be any one of a variety of problems. Guessing doesn't do the OP any good. You have to diagnose the problem properly from all the info you can get before trying to solve it.
Years ago, the most common cause given on the web for every problem was pH. Everyone was saying "check your pH." Checking pH and flushing is lame. The thing to do is get the grow medium right from the beginning.
 
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Blitz35

Well-Known Member
polishpollack said:
I guess what I was trying to say is that I'm mystified by statements here that can only be called guesses. Maybe this, maybe that, maybe calcium, maybe magnesium. I don't understand why people respond to threads with guesses when the OP hasn't put up any significant info to speak of. Without close up pics of those leaves, I don't know if it's mag def or not, and I've seen this problem close up before so I know what it looks like. The yellowing seen could be any one of a variety of problems. Guessing doesn't do the OP any good. You have to diagnose the problem properly from all the info you can get before trying to solve it.
Years ago, the most common cause given on the web for every problem was pH. Everyone was saying "check your pH." Checking pH and flushing is lame. The thing to do is get the grow medium right from the beginning.
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Ideally that's how it should go, but many people either are new or simply don't know and they run into issues along the grow..it can't be undone and can only be corrected in the now. As for giving guesses..if the OP chooses to leave out critical info, i give my opinion on what the OP delivers in their statement, and based on that, yes i firmly believe it is magnesium. The location of the yellowing, the time of flowering he is at, absolutely i dont think it's anything else. Now, the main question is, why is magnesium missing..that's the real question and that cant be known without more info..like ph, and feeding habits and source of water. it may be there just not accesible..so adding more wouldn't help. once the OP gives detailed info, then a more precise answer can be given..for now, all i can persoanlly say..is the plant is not getting enough magnesium, as to why...that's another story that needs more data to be put in :)
I wasn't guessing, no other deficiency or toxicity would cause that kind of yellowing in that location and especially at this time of the grow. I firmly believe it is a mag deficiency..and no..not cal-mag..just magnesium! Add to it the fact that he's got heavier purpling petioles, which suggests phosphorus is having a harder time getting through, because it needs magnesium to get transported.
 
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Blitz35

Well-Known Member
polishpollack said:
There's a difference between knowing and believing. What do the dark green leaves and yellowing leaf tips tell you?
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The dark green leaves may be a tad bit too much nitrogen (some slight clawing is visible), not sure if he's adding it or not, however that wouldn't affect magnesium uptake. The burnt tips can be many things, zinc is a possibility. If the plant is short on magnesium, it cant uptake phosphorus properly (purple petioles), leaving it behind in the medium, too much phosphorus would lock zinc out first, which would create burnt tips. The possibilities are many, but the intervenial yellowing, looking at the other leaves, is missing magnesium, that's what i can say. Again, if OP needed a more accurate response, then more info should have been added, i can only comment on the info given and pics posted. Being this late in the grow, im not even sure much is necessary as magnesium deficiencies show their signs weeks after it starts..by now, with such little time left, maybe it's best to let her finish..still many viable leaves left to get her nutes for the end. Yes, nitrogen should be cut out by now.
 
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