A few deficiencies. Different plants.

C

creekdipper

New Member
Hi. I'm new. This is my first post. I have a few deficiencies going on, on different plants. I'll name the plants, say what week of flower, and show the pics. I'll also say whay i think the issues are. I'd greatly appreciate any help in figuring out what the deficiencies are. Im not posting nutrients , temps, humidity, lighting and all that Just want to gey familiar with what thrse deficiencies ate assoiated with. Thank you in advance.

GMO - Photos are of older leaves, not new growth. Flipped to flower a few days ago. First white hairs appeared today..I'm thinking calcium or magnesium. But I also read the way the brown spots appear as lines it could be early phosphorus maybe. What do you think it is? I honestly don't think it's any kind of fungus.
20231009_161354.jpg

GORILLA GLUE #4 -
4 weeks into flower. Again I don't think its a fungus. The rust colored spots don't rub off at all not even a little bit. Appears on mid to older leaves. Not the very new growth. From what I read up on I'm thinking calcium maybe. What do you think?
20231009_161552.jpg

Apple Fritter -
3 weeks into flowering. Yellow around the leaf magins. From what I read up it might be potassium or magnesium... or both. The newer yellow is mote yellow as it progresses it turns whiteish. Its not nutrient burn. What do you think.
20231009_161244.jpg
 
B

bluegill

Well-Known Member
It could all just be potassium deficiency, but some of the spots look like "leaf spotting" which is caused by a fungus.
 
E

ec121

Well-Known Member
creekdipper said:
Im not posting nutrients , temps, humidity, lighting and all that Just want to gey familiar with what thrse deficiencies ate assoiated with.
Click to expand...
95% of the time it doesn't work that way. A leaf abnormality is a symptom of an issue - it can be due to a biotic or an abiotic cause. There can be several causes for a specific symptom - just like in humans. You wouldn't go to the doctor and tell him or her that you've been vomiting every day and just show the doctor a picture of your vomit and refuse to provide any other information. When you provide inadequate information, the responses you get will be inadequate.

Here's an excellent lecture by a PhD in botany on the process of identifying deficiencies, since only you know the history of your plants and are keeping that to yourself.

 
Billy the Mountain

Billy the Mountain

Well-Known Member
creekdipper said:
...


GORILLA GLUE #4 -
4 weeks into flower. Again I don't think its a fungus. The rust colored spots don't rub off at all not even a little bit. Appears on mid to older leaves. Not the very new growth. From what I read up on I'm thinking calcium maybe. What do you think?
...
Click to expand...
What are you reading that would suggest a Ca issue when the symptoms appear on older leaves but not new growth?
Mobile or immobile is usually the first step in the process of elimination.
Ca is an immobile nutrient.
Consequently, Ca deficiencies will appear on new growth first.
 
C

creekdipper

New Member
Billy the Mountain said:
What are you reading that would suggest a Ca issue when the symptoms appear on older leaves but not new growth?
Mobile or immobile is usually the first step in the process of elimination.
Ca is an immobile nutrient.
Consequently, Ca deficiencies will appear on new growth first.
Click to expand...
Yes you are right. Thanks for the reminder!
 
C

creekdipper

New Member
I understand that. What I am asking is, is what does it look like. Simply what does it look like. That's all. If you are an experienced grower, when you see leaves like that, what is the deficiency that first comes to mind. That's all. Im not being rude. Just being specific.


ec121 said:
95% of the time it doesn't work that way. A leaf abnormality is a symptom of an issue - it can be due to a biotic or an abiotic cause. There can be several causes for a specific symptom - just like in humans. You wouldn't go to the doctor and tell him or her that you've been vomiting every day and just show the doctor a picture of your vomit and refuse to provide any other information. When you provide inadequate information, the responses you get will be inadequate.

Here's an excellent lecture by a PhD in botany on the process of identifying deficiencies, since only you know the history of your plants and are keeping that to yourself.

Click to expand...
 
E

ec121

Well-Known Member
creekdipper said:
I understand that.
Click to expand...
Actually, you don't, but I'll attempt to explain it again.

creekdipper said:
What I am asking is, is what does it look like. Simply what does it look like. That's all.
Click to expand...
We can tell you if it's chlorosis, necrosis, etc., but if you're looking for the specific deficiency that is causing the abnormality, then more information is usually needed otherwise you're going to get an answer of "it can be x, y, or z" instead of an answer of "it is y."

Even if someone diagnoses the right deficiency based on a single leaf, the deficiency could be caused by an excess of another nutrient, too high or low pH, or from over/underwatering, so it's important to know what the feeding schedule is so you can fix it immediately.

As was already pointed out to you by another poster, necrosis that starts on the lower growth of the plant cannot be a calcium deficiency because calcium cannot be translocated from old growth to new growth. Therefore knowing that the leaf is the older growth of the plant is pertinent information (you did at least provide that, so kudos).

It's also not a magnesium deficiency because although magnesium starts at the bottom of the plant, it presents itself first with yellowing of the leaves while the veins stay green (i.e., interveinal chlorosis) and your example has no chlorosis.

creekdipper said:
If you are an experienced grower, when you see leaves like that, what is the deficiency that first comes to mind. That's all.
Click to expand...
The first thing that comes to mind would take into consideration is if it's at the top, middle, or bottom of the plant. Then the next thing that would come to mind is how the plant has been grown. When I see some other plant's random leaf abnormality with no history on the plant, I would narrow it down to the deficiencies that present similar abnormalities and ask questions.


creekdipper said:
Im not being rude. Just being specific.
Click to expand...
I didn't think you're being rude - just inexperienced. If you watched the first half of the video I posted, you would understand that deficiencies look similar and you have to use a process of elimination to figure out which it is.

For example, a magnesium deficiency, an iron deficiency, and light stress all present with interveinal chlorosis in the early stages, so just seeing interveinal chlorosis on a leaf with no other information given will meet you with more questions or just guesses.

If the interveinal chlorosis is only at the top of the plant and the bottom is fine, then you can rule out Mg. If the PPFD is in a normal range, then you can rule out light stress. Now you know it's an iron deficiency. Now one needs to know your feeding habits because simply overwatering can cause an iron deficiency despite sufficient iron being in the medium.

Anyway, not trying to put you on blast; just trying to explain that in most cases you can't just show a necrotic leaf and establish exactly what is causing it without any other information. Good luck with your grows.
 
Nutty sKunK

Nutty sKunK

Well-Known Member
creekdipper said:
Hi. I'm new. This is my first post. I have a few deficiencies going on, on different plants. I'll name the plants, say what week of flower, and show the pics. I'll also say whay i think the issues are. I'd greatly appreciate any help in figuring out what the deficiencies are. Im not posting nutrients , temps, humidity, lighting and all that Just want to gey familiar with what thrse deficiencies ate assoiated with. Thank you in advance.

GMO - Photos are of older leaves, not new growth. Flipped to flower a few days ago. First white hairs appeared today..I'm thinking calcium or magnesium. But I also read the way the brown spots appear as lines it could be early phosphorus maybe. What do you think it is? I honestly don't think it's any kind of fungus.
View attachment 5334079

GORILLA GLUE #4 -
4 weeks into flower. Again I don't think its a fungus. The rust colored spots don't rub off at all not even a little bit. Appears on mid to older leaves. Not the very new growth. From what I read up on I'm thinking calcium maybe. What do you think?
View attachment 5334081

Apple Fritter -
3 weeks into flowering. Yellow around the leaf magins. From what I read up it might be potassium or magnesium... or both. The newer yellow is mote yellow as it progresses it turns whiteish. Its not nutrient burn. What do you think.
View attachment 5334082
Click to expand...
Pic 1 I wouldn’t worry about unless it spreads. Looks like physical damage/retardation.

Pic 2 is calcium def. You’ll be playing catch up but upping the source of calcium is step 1.

Pic 3 looks like past water stress (drought) Again I’d only take action if it progresses. But it has the hallmarks of K def.

Keep calm and carry on
 
Dameon187

Dameon187

Well-Known Member
creekdipper said:
Hi. I'm new. This is my first post. I have a few deficiencies going on, on different plants. I'll name the plants, say what week of flower, and show the pics. I'll also say whay i think the issues are. I'd greatly appreciate any help in figuring out what the deficiencies are. Im not posting nutrients , temps, humidity, lighting and all that Just want to gey familiar with what thrse deficiencies ate assoiated with. Thank you in advance.

GMO - Photos are of older leaves, not new growth. Flipped to flower a few days ago. First white hairs appeared today..I'm thinking calcium or magnesium. But I also read the way the brown spots appear as lines it could be early phosphorus maybe. What do you think it is? I honestly don't think it's any kind of fungus.
View attachment 5334079

GORILLA GLUE #4 -
4 weeks into flower. Again I don't think its a fungus. The rust colored spots don't rub off at all not even a little bit. Appears on mid to older leaves. Not the very new growth. From what I read up on I'm thinking calcium maybe. What do you think?
View attachment 5334081

Apple Fritter -
3 weeks into flowering. Yellow around the leaf magins. From what I read up it might be potassium or magnesium... or both. The newer yellow is mote yellow as it progresses it turns whiteish. Its not nutrient burn. What do you think.
View attachment 5334082
Click to expand...
I have read how true it is, all these minerals are added to tap water. So they would adjust everything, providing your town or city pH is too high but we can resolve that. I know you didn't want to speak on nutrients you may just be able to achieve what you're looking for. achieve some satisfactory and figuring out deficiency. Try half tap and half distilled water. You can always go to your local company, find out what's exactly in it. Or at least most of the time. As for Pacific deficiencies on each plant I've gone too long so far. I know you have ruled out fungus. Are these plants all together would be another basic answer we may need. And are they all getting the same nutrients.
 
B

bluegill

Well-Known Member
creekdipper said:
I'm thinking the Apple Fritter is Potasium.
Click to expand...
The first two pics are like textbook leaf spotting; precisely, septoria. Highly doubt this is a nutrient issue. I can see mineral deposits on your leaves, so I presume you're misting the tent, and that the leaf spot fungi are spreading that way.

The last pic shows leaf margins and tips are yellowing, so this is most likely a K deficiency. It could be a bunch of stuff, though. I'd advise you to post more info if you want accurate responses.
 
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