Bugs? Nitrogen?

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SlobOnMyKnob

Active Member
Smh have dealt with a lot of issues with these grow lol.
I had noticed dark green waxy leaves and pointed down tips. So I cut way back on feeding. After about 10 days (day 7 of flower) I noticed few leaves with yellow edges. So I very slightly increased feeding. And didnt see any new leaves show signs for the last few days. And then yesterday noticed some yellow leaves. And some more green leaves with yellow tips.

when I flipped the leaves over the edges underneath have brawn circles like it was starting to die or burn there. This has me questioning if it’s a pest problem.
 

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JimmyJackCorn

Well-Known Member
Hard to say. I don't know a ton, but folks here will be able to help better if you include more details about your grow (conditions, lights, medium, etc.). More pictures of the overall plants might help, too.
 
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SlobOnMyKnob

Active Member
JimmyJackCorn said:
Hard to say. I don't know a ton, but folks here will be able to help better if you include more details about your grow (conditions, lights, medium, etc.). More pictures of the overall plants might help, too.
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temp: 77-79 degrees
Humidity : 28-32 (trying to get it up with humidifier)
Under 1000 watt hps
Fox farm happy frog
Day 15 of flower
In veg had spider mites(doesn’t look same), overwatered at start, over fert at start, and ph issues(first grow and was PH before I would add nutes)
 
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SlobOnMyKnob

Active Member
After reading and reading I’m starting to lean towards magnesium deficiency. But no pictures of the bottom of the leaves anywhere online. Does the necrosis from it do those circle shapes underneath?
 
osowhom

osowhom

Well-Known Member
SlobOnMyKnob said:
temp: 77-79 degrees
Humidity : 28-32 (trying to get it up with humidifier)
Under 1000 watt hps
Fox farm happy frog
Day 15 of flower
In veg had spider mites(doesn’t look same), overwatered at start, over fert at start, and ph issues(first grow and was PH before I would add nutes)
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did you spray them for the mites with neem oil?
 
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JimmyJackCorn

Well-Known Member
That type of necrosis can be caused by multiple issues. Where are the compromised leaves on the plants? Is it more than one plant? Is the damage localized on the plant, or spread around seemingly at random?
 
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SlobOnMyKnob

Active Member
JimmyJackCorn said:
That type of necrosis can be caused by multiple issues. Where are the compromised leaves on the plants? Is it more than one plant? Is the damage localized on the plant, or spread around seemingly at random?
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It is on all 6 plants. (3 strains). Each strain is showing it slightly different. Some more yellow, some more brown circles at edges, ect. But all showing similar. It was the lower leaves and middle leaves that are affected. The canopy is perfect.
 
GeneBanker

GeneBanker

Well-Known Member
It could be old mite dmg brought to light by over feeding. The damage won’t ever heal so if new growth is unaffected, I would just keep a close eye for any new signs.
 
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SlobOnMyKnob

Active Member
GeneBanker said:
It could be old mite dmg brought to light by over feeding. The damage won’t ever heal so if new growth is unaffected, I would just keep a close eye for any new signs.
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It’s wouldn’t be that. They were still small clones when they had mites. And I have probably removed 20 fan leaves (the only leaves affected are the older fan leaves) off each plant today that had leaves like these.
 
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Northwood

Well-Known Member
SlobOnMyKnob said:
when I flipped the leaves over the edges underneath have brawn circles like it was starting to die or burn there. This has me questioning if it’s a pest problem.
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I don't know for sure, but it looks like impatiens necrotic spot. I've never heard of cannabis getting it, but I know thrips are a common vector and it often affects whole greenhouses. It's caused by a virus.
 
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SlobOnMyKnob

Active Member
Watered today. And noticed a little bit more yellow edges. But also noticed the necrotic dots on the bottom edges of the leaves. Are more prominent on some plants then others. Others with the yellowing edges don’t have those dots. Or just the tips are necrotic not in dots. It’s mixed and random all over.
 
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DukeFluke

Well-Known Member
You need to post pictures of your whole plant with the lights off if you want proper help. Anything else is just guesswork.
 
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Northwood

Well-Known Member
Here's a photo of impatiens necrotic spot:


And here is a closeup of your leaf photo that had me especially concerned:
Capture.PNG

Whenever I see lighter areas surrounded by darker borders that become necrotic, I think virus. Sometimes deficiencies could have similar symptoms, but usually the necrosis is interveinal in that case, like with a Mg deficiency.
 
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DukeFluke

Well-Known Member
Without looking at the whole plant with lights off you can't properly diagnose even a basic deficiency, never mind a virus.
 
Cvntcrusher

Cvntcrusher

Well-Known Member
The problem is FFHF. That soil is horrid man.

Just kidding idk what the issue is. Besides ur medium. Lmao
 
FastFreddi

FastFreddi

Well-Known Member
It is either the beginnings of mg or potassium deficiency...whether from lockout, nutrient antagonism or cold root zone.
FF
 
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SlobOnMyKnob

Active Member
FastFreddi said:
It is either the beginnings of mg or potassium deficiency...whether from lockout, nutrient antagonism or cold root zone.
FF
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what temp does a cold root zone cause an issue? I know my canopy stays between 65 at night at 77-79 day. And I would guess it’s probably around 60ish at root level.
 
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