I have dark brown spots all over 1 of my plant leaf including the sugar leafs my 3 other plants have not formed this issue

[Begginergrower]

Hi guys this is my third grow i have 4 plants currently but 1 of them is forming this dark brown spots on all leafs including sugar leafs the other 3 plants have no issues that i have noticed yet . Does anyone have any idea what it could be i am currently using 3ml per litre of advanced nutrients (grow,bloom,micro) has been adviced to use together during whole cycle by the grow shop i bought from and i am using 1ml calmag per litre aswell as 1ml big bud per litre they are currently on the 3rd week of flowering i was thinking of maybe flushing my auto plants but i am seeking an advice before i do anything thanks in advance

 

[HerbalEdu]

overall they look like like light green and yellowing from the bottom, if not a lockout i'd say a tad bit more N and most prolly PK won't hurt.

brown spot could be septoria, some phenos could be more sensitive to decease than some others

 

[carlosescobar]

ha i was just about to post about brown spots as i have just experienced it halfway through bud, as well . I am growing in coco which apparently holds on to calcium and magnesium, so i added calmag and the spots not only stopped but started dissapearing. but you said you are adding calmag so i am wondering if your light is too bright or close because that will stop the up take of potassium

 

[OldOneEye]

ha i was just about to post about brown spots as i have just experienced it halfway through bud, as well . I am growing in coco which apparently holds on to calcium and magnesium, so i added calmag and the spots not only stopped but started dissapearing. but you said you are adding calmag so i am wondering if your light is too bright or close because that will stop the up take of potassium

This is a cal/mag deficiency

 

[Begginergrower]

Thanks all for your quick replies I appreciate it alot i will try to put my light a bit higher and lowering the intensity maybe that is the issue as the one that has the dark spot issue is longer then the others thanks alot i will update in a week

 

[Begginergrower]

overall they look like like light green and yellowing from the bottom, if not a lockout i'd say a tad bit more N and most prolly PK won't hurt.

brown spot could be septoria, some phenos could be more sensitive to decease than some others

Thanks i will increase the ammount of npk thanks for you fast reppy i appreciate it alot

 

[Gmix]

Thanks i will increase the ammount of npk thanks for you fast reppy i appreciate it alot

I would add some cali mg as well as said you have a cali mg deficiency

 

[Begginergrower]

Currently im putting 0.5 ml with every 1l should increase more ? If so how much would you recommend thanks

 

[Gmix]

I’d ask @OldOneEye

I’ve a abcess & feel a bit ill. probably shouldn’t be replying to threads atm

 

[OldOneEye]

Currently im putting 0.5 ml with every 1l should increase more ? If so how much would you recommend thanks

2.5 ml is what i add to my nutrient mix, with every feeding

 

[Begginergrower]

I’d ask @OldOneEye

I’ve a abcess & feel a bit ill. probably shouldn’t be replying to threads atm

Thanks mate hope you’ll have a speedy recovery get well soon

 

[Begginergrower]

2.5 ml is what i add to my nutrient mix, with every feeding

Thanks mate will increase my calmag then and i will see if it helps i will update next week hopefully they will get better

 

[Eledin]

I would bet its the lights, ph, or too much nutes. Tripack jungle has calmag and on top of that youre using more calmag. The dosage youre using is high too. Can you take a pic of how far away the lights are? Also what lights are you using?

 

[Eledin]

How often do you feed per week? Not counting only water if you do only water in between. One of the things that makes me think its not nutrient deficiency at all is the burnt tips of the leaves on the top of the plant. Thats either too much PK or too much light. I would use only 2ml/L of jungle while youre using big bud which is a PK booster with other goodies if I saw my tips crisping like that and if I know its not the lights.

 

[Eledin]

Upon downloading the pictures to be able to zoom in even more, I can clearly see your tips are yellow on the bottom too. When you start using big bud you should decrease the base npk, I had this problem many times in the past when I introduced big bud. 1ml/L of big bud is a safe dosage but still, if you add another 3ml/L of micro is kinda high so I think they had too much PK. Also a reminder that big bud is only for week 2 to 5 of flower, after that youre only gonna burn them if you keep using it. Its for bud formation not for bud fattening, you need to swap to overdrive after week 5 which is the PK booster for fattening from AN.

 

[Eledin]

My bad I was calling the micro tripart jungle. All I said is accurate just swap the name hahaha. Theyre both similar anyway, micro is better because it comes with calmag and more micronutrients like chelated minerals and aminoacids while jungle is way more basic being just NPK, calmag and a couple more minerals.

 

[Begginergrower]

My bad I was calling the micro tripart jungle. All I said is accurate just swap the name hahaha. Theyre both similar anyway, micro is better because it comes with calmag and more micronutrients like chelated minerals and aminoacids while jungle is way more basic being just NPK, calmag and a couple more minerals.

Wow thanks for your help i have another 3 plants that are fine but this one is giving me alot of trouble lately im currently using lumatek 300w(pro) been thinking of maybe flushing and start introducings nutrients again after flush i read that i should give micro tripart during all cycle which is what im doing is that right ? Thanks

 

[Begginergrower]

Wow thanks for your help i have another 3 plants that are fine but this one is giving me alot of trouble lately im currently using lumatek 300w(pro) been thinking of maybe flushing and start introducings nutrients again after flush i read that i should give micro tripart during all cycle which is what im doing is that right ? Thanks

I an currently feeding twich a week ago once i give only ph’d water 6.8 and then after when they get dry i feed with nutes i use distilled water and then ph it

 

[Eledin]

Yes you need to use all the 3 parts no matter what stage (Grow, micro and bloom). I sent you the nutrient calculator from AN via private message.
If youve been feeding correctly and phing your water I dont see why it could be a nute lockout, feeding 2 times per week seems about right too. That said there's always eventually a pheno from the same seed bag that under performs or over performs the rest, eats more or less, is more or less sensitive to light, etc...

 

[Eledin]

Think about what you did that could have been wrong, you mentioned to me that lowering the lights could have started this. Anything else? Looking at how far away you have them now I can definetely say they were too close but Im not sure thats the only thing going on, or maybe it was. Anything else that comes to mind? That can be enough though, stressed plants can show all kinds of fuckery even if they have the right ammount of nutes in the soil.