Need help diagnosing issue with plant.

[GNick55]

just google cannabis septoria black spot

go through the images as well

 

[GNick55]

This is what AI says about it. I wouldn't use Neem oil this close to flowering but the rest seem like a solid path

Treatment & Prevention Steps​

• Remove infected leaves to reduce disease spread.
• Increase air circulation (use fans, thin foliage) to decrease humidity.
• Reduce overhead watering to keep leaves dry.
• Apply an organic fungicide (neem oil, potassium bicarbonate, sulfur-based) safe for cannabis if fungal infection is confirmed27.
• Inspect for pests under leaves with a magnifying glass to rule out mites or other insects9.
• Monitor nutrients but prioritize fungal management if distinctive black spots with halos dominate the symptom pattern.

don’t trust AI

 

[GNick55]

Leaf Spot

A brief page about leaf spot, including the plants affected, a brief description, symptoms, management, and treatments.

extension.usu.edu

 

[RoadKillSkunkHunt]

don’t trust AI

I don't always, that's for sure. I argue plenty with a chat bot and usually win.

How would you treat it?

Edit: Your link mentions several fungicides. It didn't mention the one I currently have but I don't have plants outdoors this year. Only tomatoes, peppers, and watermelon. lol

 

[GNick55]

I don't always, that's for sure. I argue plenty with a chat bot and usually win.

How would you treat it?

clean up the area, makesure it can get airflow, wet/dry cycle, try to feed correct, pick off leaves that are in any stage of disease than i’d probably give the 50/50 99% isopropyl/water spray a try,. than next day or when it’s really hot and sunny i’d spray soak it with raw milk,..
so the part with iso and milk is not advice to do, just me if i didn’t look it up,..
so researching or someone else with experience with it would be better

 

[Suds.an.buds]

clean up the area, makesure it can get airflow, wet/dry cycle, try to feed correct, pick off leaves that are in any stage of disease than i’d probably give the 50/50 99% isopropyl/water spray a try,. than next day or when it’s really hot and sunny i’d spray soak it with raw milk,..
so the part with iso and milk is not advice to do, just me if i didn’t look it up,..
so researching or someone else with experience with it would be better

And don’t forget if you do use iso to cover the medium so non gets to the roots

 

[Kanehbosm35]

Looks to be root bound and lacking food I'd transplant it and give it some b1 and seaweed catalyst

 

[GNick55]

And don’t forget if you do use iso to cover the medium so non gets to the roots

yes that’s very important!! haha

 

[Captspaulding]

you better research septoria and black spot disease,.

Yep i was thinking that, or it coupd be the beginning of fungus gnats.
Def leaning sep though.
May be watering a bit too much.

 

[LoveGrowingIt]

I've read that potassium silicate helps plants be more resilient against fungus, mold, and general stress.

 

[757Botanist]

clean up the area, makesure it can get airflow, wet/dry cycle, try to feed correct, pick off leaves that are in any stage of disease than i’d probably give the 50/50 99% isopropyl/water spray a try,. than next day or when it’s really hot and sunny i’d spray soak it with raw milk,..
so the part with iso and milk is not advice to do, just me if i didn’t look it up,..
so researching or someone else with experience with it would be better

Thanks I’ll check out my options. It was doing fine and then out of no where….ive been adhering to the feed schedule, I took it as stress originally bc we did have some high heat and humidity. I’ve inspected it for pest but perhaps it’s the soil. I’d hate to loose the plant.

 

[757Botanist]

Yep i was thinking that, or it coupd be the beginning of fungus gnats.
Def leaning sep though.
May be watering a bit too much.

Yeah I thought LS too. I’ve reduced the watering to 1/2 just to keep the medium moist but not drenched. I’m going to quarantine it so the other plants don’t get infected.

 

[757Botanist]

Yep i was thinking that, or it coupd be the beginning of fungus gnats.
Def leaning sep though.
May be watering a bit too much.

That’s also been an issue: how much to water. I usually just do a gallon of rainwater but perhaps that’s too much? The infected plant is in a 7gal pot so I just figured a gal is enough. I’m still new even though this is my 6-7th run at growing but only second time outdoors so I’m learning something new daily.

 

[Timbee240]

Gotcha. Pic 1 is the plant in question the rest are its sisters doing well.View attachment 2482179View attachment 2482183View attachment 2482184View attachment 2482185View attachment 2482186View attachment 2482187

Hey buddy check it out. I think you are overthinking it. Just need to let her be and give a week of water without anything...

 

[Timbee240]

Hey buddy check it out. I think you are overthinking it. Just need to let her be and give a week of water without anything...

These are just rain water cyco nutrients 5ml to a gallon A n B grow.
Then you can do bloom all. Try pot ash literally you will see thick like mine.

 

[757Botanist]

Hey buddy check it out. I think you are overthinking it. Just need to let her be and give a week of water without anything...

Hot dang brother those are beautiful. Yeah I’m trying not to over think it. It’s going to be hot here in the next few days so I think I’m just going to quarantine her and let the soil dry up
A bit. I will look up pot ash and add it. I haven’t added any nutes since Tuesday. Did a light watering but she’s currently in a shady area. Checked for bugs and critters and she looks fine. I also removed all the yellow dying leaves

 

[GNick55]

That’s also been an issue: how much to water. I usually just do a gallon of rainwater but perhaps that’s too much? The infected plant is in a 7gal pot so I just figured a gal is enough. I’m still new even though this is my 6-7th run at growing but only second time outdoors so I’m learning something new daily.

7 gallon bag will take 1-1.5 gallons of water

 

[7munkee]

7 gallon bag will take 1-1.5 gallons of water

As a general rule, I just go 5-10% of soil volume. More if you are watering to run off. I am notorious for overwatering so I err on the lower side.

 

[757Botanist]

7 gallon bag will take 1-1.5 gallons of water

Yo! You and @Oldchucky have helped me tremendously. Just wanted to say thank you! Everyone else also, I wanna say thanks also.
The girls are recovering. The plant in question was thoroughly watered 1-1.5gals with 5ml of calmag added. I have been moving them to shade since this uptick in heat and humidity in Ole Virginny. .

 

[757Botanist]

The plant looks healthy. I think it's beginning to get ready to flower, so it's getting hungry. It needs vegetation nutrients for the stretch and is starting to need flowering nutrients. Calcium and magnesium would help, too.

The plants appear to be taking to the calmag pretty well. I tried to get the TSP brand but they were sold out so I’m using FF Bush doctor. I let them sit in full sun from 6-1pm then in the shade the rest of the day. Once in the shade they perked up into “prayer position.” I’m stoked to see what these nutes will do. I’m going to do the calmag 1x a week and then TPS 1, signal, and bloom two days later 1x per week.